{
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                "label": "WHITE"
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        "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-2026-27135",
        "tracking": {
            "current_release_date": "2026-03-30T15:11:58.001814Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
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            },
            "id": "CVE-2026-27135",
            "initial_release_date": "2026-03-18T13:05:38.148557Z",
            "revision_history": [
                {
                    "date": "2026-03-18T13:05:38.148557Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Products created (1).| References created (3)."
                },
                {
                    "date": "2026-03-18T13:05:43.009455Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-18T18:27:19.484220Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-18T18:27:21.226579Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-18T18:39:17.785327Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-18T18:39:23.958828Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-18T19:38:56.168011Z",
                    "number": "7",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-19T00:43:45.597709Z",
                    "number": "8",
                    "summary": "Source created.| CVE status created. (valid)| Products created (2)."
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                {
                    "date": "2026-03-19T00:43:47.700576Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-19T06:44:31.909191Z",
                    "number": "10",
                    "summary": "Description created for source."
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                {
                    "date": "2026-03-19T20:56:48.738151Z",
                    "number": "11",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
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                {
                    "date": "2026-03-19T20:56:51.719311Z",
                    "number": "12",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:42:27.690517Z",
                    "number": "13",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-20T09:42:32.004832Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T18:22:52.820063Z",
                    "number": "15",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (10).| Product Identifiers created (5).| Products created (4).| References created (4).| CWES updated (1).| Vendor_assessment created."
                },
                {
                    "date": "2026-03-20T18:22:56.847346Z",
                    "number": "16",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-20T18:30:33.475965Z",
                    "number": "17",
                    "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| CWES updated (1)."
                },
                {
                    "date": "2026-03-20T21:38:51.738715Z",
                    "number": "18",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (3).| CWES updated (1).| Unknown change."
                },
                {
                    "date": "2026-03-20T22:24:58.922454Z",
                    "number": "19",
                    "summary": "References created (1)."
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                {
                    "date": "2026-03-21T12:20:01.553384Z",
                    "number": "20",
                    "summary": "Products connected (5)."
                },
                {
                    "date": "2026-03-23T06:19:57.648515Z",
                    "number": "21",
                    "summary": "Products connected (2).| Product Identifiers created (4).| Product Remediations created (1).| Products created (2)."
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                {
                    "date": "2026-03-23T06:20:02.309619Z",
                    "number": "22",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-24T10:16:07.086822Z",
                    "number": "23",
                    "summary": "Products connected (1).| Product Identifiers created (1)."
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                {
                    "date": "2026-03-24T10:16:15.639701Z",
                    "number": "24",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-26T12:20:14.550133Z",
                    "number": "25",
                    "summary": "Product Remediations created (5)."
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                    "date": "2026-03-26T12:20:17.831126Z",
                    "number": "26",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-27T06:19:51.826477Z",
                    "number": "27",
                    "summary": "Product Remediations removed (5)."
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                {
                    "date": "2026-03-27T06:20:00.460996Z",
                    "number": "28",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-27T09:06:26.208321Z",
                    "number": "29",
                    "summary": "Products connected (1).| Product Identifiers created (1).| References created (2)."
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                    "date": "2026-03-27T19:40:33.809727Z",
                    "number": "30",
                    "summary": "Product Remediations created (5)."
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                {
                    "date": "2026-03-27T19:40:41.747360Z",
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                    "summary": "NCSC Score updated."
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                    "date": "2026-03-30T13:30:13.683999Z",
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                {
                    "category": "description",
                    "text": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27135"
                },
                {
                    "category": "description",
                    "text": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27135"
                },
                {
                    "category": "description",
                    "text": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
                    "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-27135"
                },
                {
                    "category": "description",
                    "text": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27135"
                },
                {
                    "category": "description",
                    "text": "nghttp2 Denial of service: Assertion failure due to the missing state validation",
                    "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar"
                },
                {
                    "category": "description",
                    "text": "A flaw was found in nghttp2. Due to missing internal state validation, the library continues to process incoming data even after a session has been terminated. A remote attacker could exploit this by sending a specially crafted HTTP/2 frame, leading to an assertion failure and a denial of service (DoS).",
                    "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27135.json"
                },
                {
                    "category": "description",
                    "text": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27135.json"
                },
                {
                    "category": "other",
                    "text": "0.00013",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "4.5",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is product data available from source Certbundde, VENDOR FIX as product remediation category",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to a product by vendor Debian, The value of the most recent EPSS score, Is related to a product by vendor Open Source, There is product data available from source Debian",
                    "title": "NCSC Score top decreasing factors"
                },
                {
                    "category": "details",
                    "text": "Severity: 3\n",
                    "title": "Vendor assessment"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5844092",
                    "CSAFPID-5844952",
                    "CSAFPID-5846592",
                    "CSAFPID-5846593",
                    "CSAFPID-1439317",
                    "CSAFPID-1439319",
                    "CSAFPID-1439326",
                    "CSAFPID-1439328",
                    "CSAFPID-1439329",
                    "CSAFPID-1706524",
                    "CSAFPID-2652741",
                    "CSAFPID-2858634",
                    "CSAFPID-5438677",
                    "CSAFPID-5438679",
                    "CSAFPID-5874215",
                    "CSAFPID-5874218",
                    "CSAFPID-5874220",
                    "CSAFPID-5874223",
                    "CSAFPID-5775800",
                    "CSAFPID-5775803",
                    "CSAFPID-5775817",
                    "CSAFPID-5775819",
                    "CSAFPID-5775820",
                    "CSAFPID-5179478",
                    "CSAFPID-5179479",
                    "CSAFPID-5890855",
                    "CSAFPID-5890856",
                    "CSAFPID-1317174"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0775.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27135.json"
                },
                {
                    "category": "external",
                    "summary": "Source - debian",
                    "url": "https://security-tracker.debian.org/tracker/CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - redhat",
                    "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27135.json"
                },
                {
                    "category": "external",
                    "summary": "Source - microsoft",
                    "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27135.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0775.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0775"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde; cveprojectv5; nvd; redhat",
                    "url": "https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27135"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "http://www.openwall.com/lists/oss-security/2026/03/20/3"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024959.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024951.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024971.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/025004.html"
                }
            ],
            "remediations": [
                {
                    "category": "vendor_fix",
                    "details": "CBL-Mariner Releases",
                    "product_ids": [
                        "CSAFPID-5179478",
                        "CSAFPID-5179479",
                        "CSAFPID-5775800",
                        "CSAFPID-5775803",
                        "CSAFPID-5890855",
                        "CSAFPID-5890856"
                    ]
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1317174",
                        "CSAFPID-1439317",
                        "CSAFPID-1439319",
                        "CSAFPID-1439326",
                        "CSAFPID-1439328",
                        "CSAFPID-1439329",
                        "CSAFPID-1706524",
                        "CSAFPID-2652741",
                        "CSAFPID-2858634",
                        "CSAFPID-5179478",
                        "CSAFPID-5179479",
                        "CSAFPID-5438677",
                        "CSAFPID-5438679",
                        "CSAFPID-5775800",
                        "CSAFPID-5775803",
                        "CSAFPID-5775817",
                        "CSAFPID-5775819",
                        "CSAFPID-5775820",
                        "CSAFPID-5844092",
                        "CSAFPID-5844952",
                        "CSAFPID-5846592",
                        "CSAFPID-5846593",
                        "CSAFPID-5874215",
                        "CSAFPID-5874218",
                        "CSAFPID-5874220",
                        "CSAFPID-5874223",
                        "CSAFPID-5890855",
                        "CSAFPID-5890856"
                    ]
                }
            ],
            "title": "CVE-2026-27135"
        }
    ]
}