{"id":"CVE-2026-92812","aliases":["EUVD-2026-81070","GHSA-5rrq-v82w-qpfr","GHSA-fjm6-6gxh-mvf2"],"status":"published","title":"Decap CMS \u003c 3.11.0 Path Traversal via Sibling Directory Prefix Matching","description":"Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00441,"percentile":0.38766,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-09-16T20:32:58Z","modified":"2026-10-29T10:30:55Z","products":[{"vendor":"decaporg","product":"decap-cms"}],"references":[{"url":"https://github.com/decaporg/decap-cms/security/advisories/GHSA-5rrq-v82w-qpfr","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/geo-chen/oss/blob/main/decap-cms.md","tags":["exploit","technical-description","evidence"]},{"url":"https://github.com/decaporg/decap-cms/releases?page=2#release-decap-cms@3.11.0","tags":["release-notes","patch","fix"]},{"url":"https://www.vulncheck.com/advisories/decap-cms-path-traversal-via-sibling-directory-prefix-matching","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92812","tags":["advisory"]},{"url":"https://github.com/decaporg/decap-cms","tags":["package"]},{"url":"https://github.com/decaporg/decap-cms/blob/11f35405cd1a1d1216e97b890173f46436752019/packages/decap-server/src/middlewares/joi/customValidators.ts#L11-L16"},{"url":"https://www.vulncheck.com/advisories/decap-server-path-traversal-via-sibling-directory-prefix-matching"},{"url":"https://github.com/advisories/GHSA-fjm6-6gxh-mvf2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92812.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-92812","title":"Decap CMS \u003c 3.11.0 Path Traversal via Sibling Directory Prefix Matching","description":"Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","status":"published","published":"2026-09-16T20:32:58.261Z","modified":"2026-10-28T19:05:52.48Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:48:24.536396Z"}],"euvd":[{"id":"EUVD-2026-81070","description":"Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","status":"published","published":"2026-09-16T20:32:58Z","modified":"2026-10-28T19:05:52Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T16:59:19.203779Z"}],"ghsa":[{"id":"GHSA-fjm6-6gxh-mvf2","title":"decap-server contains a path traversal vulnerability in the local proxy containment guard that...","description":"decap-server contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","status":"published","published":"2026-09-16T21:32:57Z","modified":"2026-10-22T18:38:33Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:14:16.352322Z"}],"nvd":[{"id":"CVE-2026-92812","description":"Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","status":"published","published":"2026-09-16T21:17:31.017Z","modified":"2026-10-22T16:19:15.99Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:49.013904Z"}],"osv":[{"id":"CVE-2026-92812","title":"Decap CMS \u003c 3.11.0 Path Traversal via Sibling Directory Prefix Matching","description":"Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.","status":"published","published":"2026-09-16T20:32:58.261Z","modified":"2026-10-29T10:30:55.275015241Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:20.588039Z"}]}}