{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63478","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-16T21:37:45.769Z","datePublished":"2026-11-03T19:39:52.188Z","dateUpdated":"2026-11-03T19:39:52.188Z"},"containers":{"cna":{"title":"isomorphic-git: Path traversal via a \"..\" tree-entry name writes files outside the working directory on clone/checkout","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-cw2g-2vwq-88w6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-cw2g-2vwq-88w6"},{"name":"https://github.com/isomorphic-git/isomorphic-git/pull/2370","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/pull/2370"},{"name":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b"},{"name":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6"}],"affected":[{"vendor":"isomorphic-git","product":"isomorphic-git","versions":[{"version":"< 1.38.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-03T19:39:52.188Z"},"descriptions":[{"lang":"en","value":"isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git's tree parser in src/models/GitTree.js accepts a standalone .. tree-entry name because it rejects only path separators. During clone or checkout from a malicious or man-in-the-middle-controlled non-GitHub remote, nested .. entries can escape the working-tree root and write files at attacker-selected parent paths on any host-backed fs provider. The arbitrary file write can overwrite startup or configuration files and lead to code execution. GitHub-hosted trees are not a direct source because GitHub rejects .. entries during repository integrity checks. This issue is fixed in version 1.38.6."}],"source":{"advisory":"GHSA-cw2g-2vwq-88w6","discovery":"UNKNOWN"}}}}