{ "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-2026-27699", "tracking": { "current_release_date": "2026-03-23T03:40:19.133955Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-27699", "initial_release_date": "2026-02-25T15:29:55.062187Z", "revision_history": [ { "date": "2026-02-25T15:29:55.062187Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-02-25T15:30:03.163585Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-25T15:34:53.186560Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-02-25T15:38:39.992490Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-25T15:38:46.663581Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-02-25T22:39:47.262706Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)." }, { "date": "2026-02-26T00:14:20.863019Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (107).| References created (5).| CWES updated (1)." }, { "date": "2026-02-26T00:23:34.223845Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (4).| CWES updated (1)." }, { "date": "2026-02-26T00:27:34.513037Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-02-26T12:43:58.195504Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source." }, { "date": "2026-02-26T14:13:43.857643Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-26T16:26:52.794434Z", "number": "12", "summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-02-26T16:26:54.455735Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-02-27T17:38:54.504634Z", "number": "14", "summary": "Unknown change." }, { "date": "2026-03-20T09:40:08.896673Z", "number": "15", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:40:12.583595Z", "number": "16", "summary": "NCSC Score updated." } ], "status": "interim", "version": "16" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.0.6", "product": { "name": "vers:unknown/1.0.6", "product_id": "CSAFPID-5713486" } }, { "category": "product_version_range", "name": "vers:unknown/4.6.6", "product": { "name": "vers:unknown/4.6.6", "product_id": "CSAFPID-5713487" } }, { "category": "product_version_range", "name": "vers:unknown/<5.2.0", "product": { "name": "vers:unknown/<5.2.0", "product_id": "CSAFPID-5702881", "product_identification_helper": { "cpe": "cpe:2.3:a:patrickjuchli:basic-ftp:*:*:*:*:*:node.js:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<5.2.0", "product": { "name": "vers:unknown/>=0|<5.2.0", "product_id": "CSAFPID-5721024" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.2", "product": { "name": "vers:unknown/v1.0.2", "product_id": "CSAFPID-5713488" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.3", "product": { "name": "vers:unknown/v1.0.3", "product_id": "CSAFPID-5713489" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.4", "product": { "name": "vers:unknown/v1.0.4", "product_id": "CSAFPID-5713490" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.5", "product": { "name": "vers:unknown/v1.0.5", "product_id": "CSAFPID-5713491" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.7", "product": { "name": "vers:unknown/v1.0.7", "product_id": "CSAFPID-5713492" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.8", "product": { "name": "vers:unknown/v1.0.8", "product_id": "CSAFPID-5713493" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.9", "product": { "name": "vers:unknown/v1.0.9", "product_id": "CSAFPID-5713494" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.0", "product": { "name": "vers:unknown/v1.1.0", "product_id": "CSAFPID-5713495" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.1", "product": { "name": "vers:unknown/v1.1.1", "product_id": "CSAFPID-5713496" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.0", "product": { "name": "vers:unknown/v1.2.0", "product_id": "CSAFPID-5713497" } }, { "category": "product_version_range", "name": "vers:unknown/v2.0.0", "product": { "name": "vers:unknown/v2.0.0", "product_id": "CSAFPID-5713498" } }, { "category": "product_version_range", "name": "vers:unknown/v2.1.0", "product": { "name": "vers:unknown/v2.1.0", "product_id": "CSAFPID-5713499" } }, { "category": "product_version_range", "name": "vers:unknown/v2.10.0", "product": { "name": "vers:unknown/v2.10.0", "product_id": "CSAFPID-5713500" } }, { "category": "product_version_range", "name": "vers:unknown/v2.11.0", "product": { "name": "vers:unknown/v2.11.0", "product_id": "CSAFPID-5713501" } }, { "category": "product_version_range", "name": "vers:unknown/v2.12.0", "product": { "name": "vers:unknown/v2.12.0", "product_id": "CSAFPID-5713502" } }, { "category": "product_version_range", "name": "vers:unknown/v2.12.1", "product": { "name": "vers:unknown/v2.12.1", "product_id": "CSAFPID-5713503" } }, { "category": "product_version_range", "name": "vers:unknown/v2.12.2", "product": { "name": "vers:unknown/v2.12.2", "product_id": "CSAFPID-5713504" } }, { "category": "product_version_range", "name": "vers:unknown/v2.12.3", "product": { "name": "vers:unknown/v2.12.3", "product_id": "CSAFPID-5713505" } }, { "category": "product_version_range", "name": "vers:unknown/v2.13.0", "product": { "name": "vers:unknown/v2.13.0", "product_id": "CSAFPID-5713506" } }, { "category": "product_version_range", "name": "vers:unknown/v2.13.1", "product": { "name": "vers:unknown/v2.13.1", "product_id": "CSAFPID-5713507" } }, { "category": "product_version_range", "name": "vers:unknown/v2.13.2", "product": { "name": "vers:unknown/v2.13.2", "product_id": "CSAFPID-5713508" } }, { "category": "product_version_range", "name": "vers:unknown/v2.14.0", "product": { "name": "vers:unknown/v2.14.0", "product_id": "CSAFPID-5713509" } }, { "category": "product_version_range", "name": "vers:unknown/v2.14.1", "product": { "name": "vers:unknown/v2.14.1", "product_id": "CSAFPID-5713510" } }, { "category": "product_version_range", "name": "vers:unknown/v2.14.2", "product": { "name": "vers:unknown/v2.14.2", "product_id": "CSAFPID-5713511" } }, { "category": "product_version_range", "name": "vers:unknown/v2.14.3", "product": { "name": "vers:unknown/v2.14.3", "product_id": "CSAFPID-5713512" } }, { "category": "product_version_range", "name": "vers:unknown/v2.14.4", "product": { "name": "vers:unknown/v2.14.4", "product_id": "CSAFPID-5713513" } }, { "category": "product_version_range", "name": "vers:unknown/v2.15.0", "product": { "name": "vers:unknown/v2.15.0", "product_id": "CSAFPID-5713514" } }, { "category": "product_version_range", "name": "vers:unknown/v2.16.0", "product": { "name": "vers:unknown/v2.16.0", "product_id": "CSAFPID-5713515" } }, { "category": "product_version_range", "name": "vers:unknown/v2.16.1", "product": { "name": "vers:unknown/v2.16.1", "product_id": "CSAFPID-5713516" } }, { "category": "product_version_range", "name": "vers:unknown/v2.17.0", "product": { "name": "vers:unknown/v2.17.0", "product_id": "CSAFPID-5713517" } }, { "category": "product_version_range", "name": "vers:unknown/v2.17.1", "product": { "name": "vers:unknown/v2.17.1", "product_id": "CSAFPID-5713518" } }, { "category": "product_version_range", "name": "vers:unknown/v2.2.0", "product": { "name": "vers:unknown/v2.2.0", "product_id": "CSAFPID-5713519" } }, { "category": "product_version_range", "name": "vers:unknown/v2.2.1", "product": { "name": "vers:unknown/v2.2.1", "product_id": "CSAFPID-5713520" } }, { "category": "product_version_range", "name": "vers:unknown/v2.3.0", "product": { "name": "vers:unknown/v2.3.0", "product_id": "CSAFPID-5713521" } }, { "category": "product_version_range", "name": "vers:unknown/v2.3.1", "product": { "name": "vers:unknown/v2.3.1", "product_id": "CSAFPID-5713522" } }, { "category": "product_version_range", "name": "vers:unknown/v2.3.2", "product": { "name": "vers:unknown/v2.3.2", "product_id": "CSAFPID-5713523" } }, { "category": "product_version_range", "name": "vers:unknown/v2.3.3", "product": { "name": "vers:unknown/v2.3.3", "product_id": "CSAFPID-5713524" } }, { "category": "product_version_range", "name": "vers:unknown/v2.4.0", "product": { "name": "vers:unknown/v2.4.0", "product_id": "CSAFPID-5713525" } }, { "category": "product_version_range", "name": "vers:unknown/v2.4.1", "product": { "name": "vers:unknown/v2.4.1", "product_id": "CSAFPID-5713526" } }, { "category": "product_version_range", "name": "vers:unknown/v2.4.2", "product": { "name": "vers:unknown/v2.4.2", "product_id": "CSAFPID-5713527" } }, { "category": "product_version_range", "name": "vers:unknown/v2.5.0", "product": { "name": "vers:unknown/v2.5.0", "product_id": "CSAFPID-5713528" } }, { "category": "product_version_range", "name": "vers:unknown/v2.5.1", "product": { "name": "vers:unknown/v2.5.1", "product_id": "CSAFPID-5713529" } }, { "category": "product_version_range", "name": "vers:unknown/v2.5.2", "product": { "name": "vers:unknown/v2.5.2", "product_id": "CSAFPID-5713530" } }, { "category": "product_version_range", "name": "vers:unknown/v2.6.0", "product": { "name": "vers:unknown/v2.6.0", "product_id": "CSAFPID-5713531" } }, { "category": "product_version_range", "name": "vers:unknown/v2.6.1", "product": { "name": "vers:unknown/v2.6.1", "product_id": "CSAFPID-5713532" } }, { "category": "product_version_range", "name": "vers:unknown/v2.6.2", "product": { "name": "vers:unknown/v2.6.2", "product_id": "CSAFPID-5713533" } }, { "category": "product_version_range", "name": "vers:unknown/v2.7.0", "product": { "name": "vers:unknown/v2.7.0", "product_id": "CSAFPID-5713534" } }, { "category": "product_version_range", "name": "vers:unknown/v2.7.1", "product": { "name": "vers:unknown/v2.7.1", "product_id": "CSAFPID-5713535" } }, { "category": "product_version_range", "name": "vers:unknown/v2.8.0", "product": { "name": "vers:unknown/v2.8.0", "product_id": "CSAFPID-5713536" } }, { "category": "product_version_range", "name": "vers:unknown/v2.8.1", "product": { "name": "vers:unknown/v2.8.1", "product_id": "CSAFPID-5713537" } }, { "category": "product_version_range", "name": "vers:unknown/v2.8.2", "product": { "name": "vers:unknown/v2.8.2", "product_id": "CSAFPID-5713538" } }, { "category": "product_version_range", "name": "vers:unknown/v2.8.3", "product": { "name": "vers:unknown/v2.8.3", "product_id": "CSAFPID-5713539" } }, { "category": "product_version_range", "name": "vers:unknown/v2.9.0", "product": { "name": "vers:unknown/v2.9.0", "product_id": "CSAFPID-5713540" } }, { "category": "product_version_range", "name": "vers:unknown/v2.9.1", "product": { "name": "vers:unknown/v2.9.1", "product_id": "CSAFPID-5713541" } }, { "category": "product_version_range", "name": "vers:unknown/v2.9.2", "product": { "name": "vers:unknown/v2.9.2", "product_id": "CSAFPID-5713542" } }, { "category": "product_version_range", "name": "vers:unknown/v3.0.0", "product": { "name": "vers:unknown/v3.0.0", "product_id": "CSAFPID-5713543" } }, { "category": "product_version_range", "name": "vers:unknown/v3.1.0", "product": { "name": "vers:unknown/v3.1.0", "product_id": "CSAFPID-5713544" } }, { "category": "product_version_range", "name": "vers:unknown/v3.1.1", "product": { "name": "vers:unknown/v3.1.1", "product_id": "CSAFPID-5713545" } }, { "category": "product_version_range", "name": "vers:unknown/v3.2.0", "product": { "name": "vers:unknown/v3.2.0", "product_id": "CSAFPID-5713546" } }, { "category": "product_version_range", "name": "vers:unknown/v3.2.1", "product": { "name": "vers:unknown/v3.2.1", "product_id": "CSAFPID-5713547" } }, { "category": "product_version_range", "name": "vers:unknown/v3.2.2", "product": { "name": "vers:unknown/v3.2.2", "product_id": "CSAFPID-5713548" } }, { "category": "product_version_range", "name": "vers:unknown/v3.3.0", "product": { "name": "vers:unknown/v3.3.0", "product_id": "CSAFPID-5713549" } }, { "category": "product_version_range", "name": "vers:unknown/v3.3.1", "product": { "name": "vers:unknown/v3.3.1", "product_id": "CSAFPID-5713550" } }, { "category": "product_version_range", "name": "vers:unknown/v3.4.0", "product": { "name": "vers:unknown/v3.4.0", "product_id": "CSAFPID-5713551" } }, { "category": "product_version_range", "name": "vers:unknown/v3.4.1", "product": { "name": "vers:unknown/v3.4.1", "product_id": "CSAFPID-5713552" } }, { "category": "product_version_range", "name": "vers:unknown/v3.4.2", "product": { "name": "vers:unknown/v3.4.2", "product_id": "CSAFPID-5713553" } }, { "category": "product_version_range", "name": "vers:unknown/v3.4.3", "product": { "name": "vers:unknown/v3.4.3", "product_id": "CSAFPID-5713554" } }, { "category": "product_version_range", "name": "vers:unknown/v3.4.4", "product": { "name": "vers:unknown/v3.4.4", "product_id": "CSAFPID-5713555" } }, { "category": "product_version_range", "name": "vers:unknown/v3.5.0", "product": { "name": "vers:unknown/v3.5.0", "product_id": "CSAFPID-5713556" } }, { "category": "product_version_range", "name": "vers:unknown/v3.6.0", "product": { "name": "vers:unknown/v3.6.0", "product_id": "CSAFPID-5713557" } }, { "category": "product_version_range", "name": "vers:unknown/v3.7.0", "product": { "name": "vers:unknown/v3.7.0", "product_id": "CSAFPID-5713558" } }, { "category": "product_version_range", "name": "vers:unknown/v3.7.1", "product": { "name": "vers:unknown/v3.7.1", "product_id": "CSAFPID-5713559" } }, { "category": "product_version_range", "name": "vers:unknown/v3.8.0", "product": { "name": "vers:unknown/v3.8.0", "product_id": "CSAFPID-5713560" } }, { "category": "product_version_range", "name": "vers:unknown/v3.8.1", "product": { "name": "vers:unknown/v3.8.1", "product_id": "CSAFPID-5713561" } }, { "category": "product_version_range", "name": "vers:unknown/v3.8.2", "product": { "name": "vers:unknown/v3.8.2", "product_id": "CSAFPID-5713562" } }, { "category": "product_version_range", "name": "vers:unknown/v3.8.3", "product": { "name": "vers:unknown/v3.8.3", "product_id": "CSAFPID-5713563" } }, { "category": "product_version_range", "name": "vers:unknown/v4.0.0", "product": { "name": "vers:unknown/v4.0.0", "product_id": "CSAFPID-5713564" } }, { "category": "product_version_range", "name": "vers:unknown/v4.0.1", "product": { "name": "vers:unknown/v4.0.1", "product_id": "CSAFPID-5713565" } }, { "category": "product_version_range", "name": "vers:unknown/v4.0.2", "product": { "name": "vers:unknown/v4.0.2", "product_id": "CSAFPID-5713566" } }, { "category": "product_version_range", "name": "vers:unknown/v4.1.0", "product": { "name": "vers:unknown/v4.1.0", "product_id": "CSAFPID-5713567" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.0", "product": { "name": "vers:unknown/v4.2.0", "product_id": "CSAFPID-5713568" } }, { "category": "product_version_range", "name": "vers:unknown/v4.2.1", "product": { "name": "vers:unknown/v4.2.1", "product_id": "CSAFPID-5713569" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.0", "product": { "name": "vers:unknown/v4.3.0", "product_id": "CSAFPID-5713570" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.1", "product": { "name": "vers:unknown/v4.3.1", "product_id": "CSAFPID-5713571" } }, { "category": "product_version_range", "name": "vers:unknown/v4.3.2", "product": { "name": "vers:unknown/v4.3.2", "product_id": "CSAFPID-5713572" } }, { "category": "product_version_range", "name": "vers:unknown/v4.4.0", "product": { "name": "vers:unknown/v4.4.0", "product_id": "CSAFPID-5713573" } }, { "category": "product_version_range", "name": "vers:unknown/v4.4.1", "product": { "name": "vers:unknown/v4.4.1", "product_id": "CSAFPID-5713574" } }, { "category": "product_version_range", "name": "vers:unknown/v4.5.0", "product": { "name": "vers:unknown/v4.5.0", "product_id": "CSAFPID-5713575" } }, { "category": "product_version_range", "name": "vers:unknown/v4.5.1", "product": { "name": "vers:unknown/v4.5.1", "product_id": "CSAFPID-5713576" } }, { "category": "product_version_range", "name": "vers:unknown/v4.5.2", "product": { "name": "vers:unknown/v4.5.2", "product_id": "CSAFPID-5713577" } }, { "category": "product_version_range", "name": "vers:unknown/v4.5.3", "product": { "name": "vers:unknown/v4.5.3", "product_id": "CSAFPID-5713578" } }, { "category": "product_version_range", "name": "vers:unknown/v4.5.4", "product": { "name": "vers:unknown/v4.5.4", "product_id": "CSAFPID-5713579" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.0", "product": { "name": "vers:unknown/v4.6.0", "product_id": "CSAFPID-5713580" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.1", "product": { "name": "vers:unknown/v4.6.1", "product_id": "CSAFPID-5713581" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.2", "product": { "name": "vers:unknown/v4.6.2", "product_id": "CSAFPID-5713582" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.3", "product": { "name": "vers:unknown/v4.6.3", "product_id": "CSAFPID-5713583" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.4", "product": { "name": "vers:unknown/v4.6.4", "product_id": "CSAFPID-5713584" } }, { "category": "product_version_range", "name": "vers:unknown/v4.6.5", "product": { "name": "vers:unknown/v4.6.5", "product_id": "CSAFPID-5713585" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.0", "product": { "name": "vers:unknown/v5.0.0", "product_id": "CSAFPID-5713586" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.1", "product": { "name": "vers:unknown/v5.0.1", "product_id": "CSAFPID-5713587" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.2", "product": { "name": "vers:unknown/v5.0.2", "product_id": "CSAFPID-5713588" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.3", "product": { "name": "vers:unknown/v5.0.3", "product_id": "CSAFPID-5713589" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.4", "product": { "name": "vers:unknown/v5.0.4", "product_id": "CSAFPID-5713590" } }, { "category": "product_version_range", "name": "vers:unknown/v5.0.5", "product": { "name": "vers:unknown/v5.0.5", "product_id": "CSAFPID-5713591" } }, { "category": "product_version_range", "name": "vers:unknown/v5.1.0", "product": { "name": "vers:unknown/v5.1.0", "product_id": "CSAFPID-5713592" } } ], "category": "product_name", "name": "basic-ftp" } ], "category": "vendor", "name": "patrickjuchli" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27699", "cwe": { "id": "CWE-22", "name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" }, "notes": [ { "category": "description", "text": "The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27699" }, { "category": "description", "text": "The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27699" }, { "category": "description", "text": "The `basic-ftp` library contains a path traversal vulnerability in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory.\n\n\n## Source-to-Sink Flow\n\n```\n1. SOURCE: FTP server sends LIST response\n└─> \"-rw-r--r-- 1 user group 1024 Jan 20 12:00 ../../../etc/passwd\"\n\n2. PARSER: parseListUnix.ts:100 extracts filename\n└─> file.name = \"../../../etc/passwd\"\n\n3. VALIDATION: parseListUnix.ts:101 checks\n└─> if (name === \".\" || name === \"..\") ❌ (only filters exact matches)\n└─> \"../../../etc/passwd\" !== \".\" && !== \"..\" ✅ PASSES\n\n4. SINK: Client.ts:707 uses filename directly\n└─> const localPath = join(localDirPath, file.name)\n└─> join(\"/safe/download\", \"../../../etc/passwd\")\n└─> Result: \"/safe/download/../../../etc/passwd\" → resolves to \"/etc/passwd\"\n\n5. FILE WRITE: Client.ts:512 opens file\n└─> fsOpen(localPath, \"w\") → writes to /etc/passwd (outside intended directory)\n```\n\n## Vulnerable Code\n\n**File**: `src/Client.ts:707`\n\n```typescript\nprotected async _downloadFromWorkingDir(localDirPath: string): Promise {\nawait ensureLocalDirectory(localDirPath)\nfor (const file of await this.list()) {\nconst localPath = join(localDirPath, file.name) // ⚠️ VULNERABLE\n// file.name comes from untrusted FTP server, no sanitization\nawait this.downloadTo(localPath, file.name)\n}\n}\n```\n\n**Root Cause**:\n- Parser validation (`parseListUnix.ts:101`) only filters exact `.` or `..` entries\n- No sanitization of `../` sequences in filenames\n- `path.join()` doesn't prevent traversal, `fs.open()` resolves paths\n\n\n# Impact\n\nA malicious FTP server can:\n- Write files to arbitrary locations on the client filesystem\n- Overwrite critical system files (if user has write access)\n- Potentially achieve remote code execution\n\n## Affected Versions\n\n- **Tested**: v5.1.0\n- **Likely**: All versions (code pattern exists since initial implementation)\n\n## Mitigation\n\n**Workaround**: Do not use `downloadToDir()` with untrusted FTP servers.\n\n**Fix**: Sanitize filenames before use:\n\n```typescript\nimport { basename } from 'path'\n\n// In _downloadFromWorkingDir:\nconst sanitizedName = basename(file.name) // Strip path components\nconst localPath = join(localDirPath, sanitizedName)\n```", "title": "github - https://github.com/advisories/GHSA-5rq4-664w-9x2c" }, { "category": "description", "text": "The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27699.json?alt=media" }, { "category": "description", "text": "The `basic-ftp` library contains a path traversal vulnerability in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory.\n\n\n## Source-to-Sink Flow\n\n```\n1. SOURCE: FTP server sends LIST response\n└─> \"-rw-r--r-- 1 user group 1024 Jan 20 12:00 ../../../etc/passwd\"\n\n2. PARSER: parseListUnix.ts:100 extracts filename\n└─> file.name = \"../../../etc/passwd\"\n\n3. VALIDATION: parseListUnix.ts:101 checks\n└─> if (name === \".\" || name === \"..\") ❌ (only filters exact matches)\n└─> \"../../../etc/passwd\" !== \".\" && !== \"..\" ✅ PASSES\n\n4. SINK: Client.ts:707 uses filename directly\n└─> const localPath = join(localDirPath, file.name)\n└─> join(\"/safe/download\", \"../../../etc/passwd\")\n└─> Result: \"/safe/download/../../../etc/passwd\" → resolves to \"/etc/passwd\"\n\n5. FILE WRITE: Client.ts:512 opens file\n└─> fsOpen(localPath, \"w\") → writes to /etc/passwd (outside intended directory)\n```\n\n## Vulnerable Code\n\n**File**: `src/Client.ts:707`\n\n```typescript\nprotected async _downloadFromWorkingDir(localDirPath: string): Promise {\nawait ensureLocalDirectory(localDirPath)\nfor (const file of await this.list()) {\nconst localPath = join(localDirPath, file.name) // ⚠️ VULNERABLE\n// file.name comes from untrusted FTP server, no sanitization\nawait this.downloadTo(localPath, file.name)\n}\n}\n```\n\n**Root Cause**:\n- Parser validation (`parseListUnix.ts:101`) only filters exact `.` or `..` entries\n- No sanitization of `../` sequences in filenames\n- `path.join()` doesn't prevent traversal, `fs.open()` resolves paths\n\n\n# Impact\n\nA malicious FTP server can:\n- Write files to arbitrary locations on the client filesystem\n- Overwrite critical system files (if user has write access)\n- Potentially achieve remote code execution\n\n## Affected Versions\n\n- **Tested**: v5.1.0\n- **Likely**: All versions (code pattern exists since initial implementation)\n\n## Mitigation\n\n**Workaround**: Do not use `downloadToDir()` with untrusted FTP servers.\n\n**Fix**: Sanitize filenames before use:\n\n```typescript\nimport { basename } from 'path'\n\n// In _downloadFromWorkingDir:\nconst sanitizedName = basename(file.name) // Strip path components\nconst localPath = join(localDirPath, sanitizedName)\n```", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-5rq4-664w-9x2c.json?alt=media" }, { "category": "description", "text": "No description is available for this CVE.\nIn default configurations Red Hat on products affected applications do not allow for arbitrary file overwrites. The files which may be overwritten are scoped to the active user permissions that the process is executing with.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-27699" }, { "category": "description", "text": "The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-27699" }, { "category": "other", "text": "0.00074", "title": "EPSS" }, { "category": "other", "text": "3.8", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, There is exploit data available from source Nvd", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5702881", "CSAFPID-5713486", "CSAFPID-5713487", "CSAFPID-5713488", "CSAFPID-5713489", "CSAFPID-5713490", "CSAFPID-5713491", "CSAFPID-5713492", "CSAFPID-5713493", "CSAFPID-5713494", "CSAFPID-5713495", "CSAFPID-5713496", "CSAFPID-5713497", "CSAFPID-5713498", "CSAFPID-5713499", "CSAFPID-5713500", "CSAFPID-5713501", "CSAFPID-5713502", "CSAFPID-5713503", "CSAFPID-5713504", "CSAFPID-5713505", "CSAFPID-5713506", "CSAFPID-5713507", "CSAFPID-5713508", "CSAFPID-5713509", "CSAFPID-5713510", "CSAFPID-5713511", "CSAFPID-5713512", "CSAFPID-5713513", "CSAFPID-5713514", "CSAFPID-5713515", "CSAFPID-5713516", "CSAFPID-5713517", "CSAFPID-5713518", "CSAFPID-5713519", "CSAFPID-5713520", "CSAFPID-5713521", "CSAFPID-5713522", "CSAFPID-5713523", "CSAFPID-5713524", "CSAFPID-5713525", "CSAFPID-5713526", "CSAFPID-5713527", "CSAFPID-5713528", "CSAFPID-5713529", "CSAFPID-5713530", "CSAFPID-5713531", "CSAFPID-5713532", "CSAFPID-5713533", "CSAFPID-5713534", "CSAFPID-5713535", "CSAFPID-5713536", "CSAFPID-5713537", "CSAFPID-5713538", "CSAFPID-5713539", "CSAFPID-5713540", "CSAFPID-5713541", "CSAFPID-5713542", "CSAFPID-5713543", "CSAFPID-5713544", "CSAFPID-5713545", "CSAFPID-5713546", "CSAFPID-5713547", "CSAFPID-5713548", "CSAFPID-5713549", "CSAFPID-5713550", "CSAFPID-5713551", "CSAFPID-5713552", "CSAFPID-5713553", "CSAFPID-5713554", "CSAFPID-5713555", "CSAFPID-5713556", "CSAFPID-5713557", "CSAFPID-5713558", "CSAFPID-5713559", "CSAFPID-5713560", "CSAFPID-5713561", "CSAFPID-5713562", "CSAFPID-5713563", "CSAFPID-5713564", "CSAFPID-5713565", "CSAFPID-5713566", "CSAFPID-5713567", "CSAFPID-5713568", "CSAFPID-5713569", "CSAFPID-5713570", "CSAFPID-5713571", "CSAFPID-5713572", "CSAFPID-5713573", "CSAFPID-5713574", "CSAFPID-5713575", "CSAFPID-5713576", "CSAFPID-5713577", "CSAFPID-5713578", "CSAFPID-5713579", "CSAFPID-5713580", "CSAFPID-5713581", "CSAFPID-5713582", "CSAFPID-5713583", "CSAFPID-5713584", "CSAFPID-5713585", "CSAFPID-5713586", "CSAFPID-5713587", "CSAFPID-5713588", "CSAFPID-5713589", "CSAFPID-5713590", "CSAFPID-5713591", "CSAFPID-5713592", "CSAFPID-5721024" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27699" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27699" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27699" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27699.json" }, { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-5rq4-664w-9x2c" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-5rq4-664w-9x2c" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27699.json?alt=media" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-5rq4-664w-9x2c.json?alt=media" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-27699" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27699.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-27699" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27699" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2c" }, { "category": "external", "summary": "Reference - github; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27699" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-5rq4-664w-9x2c" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27699.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27699" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-5702881", "CSAFPID-5713486", "CSAFPID-5713487", "CSAFPID-5713488", "CSAFPID-5713489", "CSAFPID-5713490", "CSAFPID-5713491", "CSAFPID-5713492", "CSAFPID-5713493", "CSAFPID-5713494", "CSAFPID-5713495", "CSAFPID-5713496", "CSAFPID-5713497", "CSAFPID-5713498", "CSAFPID-5713499", "CSAFPID-5713500", "CSAFPID-5713501", "CSAFPID-5713502", "CSAFPID-5713503", "CSAFPID-5713504", "CSAFPID-5713505", "CSAFPID-5713506", "CSAFPID-5713507", "CSAFPID-5713508", "CSAFPID-5713509", "CSAFPID-5713510", "CSAFPID-5713511", "CSAFPID-5713512", "CSAFPID-5713513", "CSAFPID-5713514", "CSAFPID-5713515", "CSAFPID-5713516", "CSAFPID-5713517", "CSAFPID-5713518", "CSAFPID-5713519", "CSAFPID-5713520", "CSAFPID-5713521", "CSAFPID-5713522", "CSAFPID-5713523", "CSAFPID-5713524", "CSAFPID-5713525", "CSAFPID-5713526", "CSAFPID-5713527", "CSAFPID-5713528", "CSAFPID-5713529", "CSAFPID-5713530", "CSAFPID-5713531", "CSAFPID-5713532", "CSAFPID-5713533", "CSAFPID-5713534", "CSAFPID-5713535", "CSAFPID-5713536", "CSAFPID-5713537", "CSAFPID-5713538", "CSAFPID-5713539", "CSAFPID-5713540", "CSAFPID-5713541", "CSAFPID-5713542", "CSAFPID-5713543", "CSAFPID-5713544", "CSAFPID-5713545", "CSAFPID-5713546", "CSAFPID-5713547", "CSAFPID-5713548", "CSAFPID-5713549", "CSAFPID-5713550", "CSAFPID-5713551", "CSAFPID-5713552", "CSAFPID-5713553", "CSAFPID-5713554", "CSAFPID-5713555", "CSAFPID-5713556", "CSAFPID-5713557", "CSAFPID-5713558", "CSAFPID-5713559", "CSAFPID-5713560", "CSAFPID-5713561", "CSAFPID-5713562", "CSAFPID-5713563", "CSAFPID-5713564", "CSAFPID-5713565", "CSAFPID-5713566", "CSAFPID-5713567", "CSAFPID-5713568", "CSAFPID-5713569", "CSAFPID-5713570", "CSAFPID-5713571", "CSAFPID-5713572", "CSAFPID-5713573", "CSAFPID-5713574", "CSAFPID-5713575", "CSAFPID-5713576", "CSAFPID-5713577", "CSAFPID-5713578", "CSAFPID-5713579", "CSAFPID-5713580", "CSAFPID-5713581", "CSAFPID-5713582", "CSAFPID-5713583", "CSAFPID-5713584", "CSAFPID-5713585", "CSAFPID-5713586", "CSAFPID-5713587", "CSAFPID-5713588", "CSAFPID-5713589", "CSAFPID-5713590", "CSAFPID-5713591", "CSAFPID-5713592", "CSAFPID-5721024" ] } ], "title": "CVE-2026-27699" } ] }