{"id":"EM-20261109-UBEI","url":"https://cyber.eventmonitor.net/incident/EM-20261109-UBEI/isomorphic-git-vulnerability-cve-2026-63478/","type":"cve","title":"isomorphic-git Vulnerability (CVE-2026-63478)","subtitle":"CVE-2026-63478","subject":"CVE-2026-63478","status":"Developing","severity":"medium","affected":[],"headline":null,"born":"2026-11-09T20:13:52.000Z","firstSignal":"2026-11-03T19:39:52.000Z","lastSignal":"2026-11-09T20:13:52.000Z","updated":"2026-11-09T20:54:22.269Z","revision":1,"life":[{"status":"Born","at":"2026-11-09T20:13:52.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-11-09T20:13:52.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-03T19:39:52.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-09T20:13:52.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261109-UBEI created."}],"stages":[{"name":"Disclosed","at":"2026-11-03T20:18:16.240Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-03T20:18:16.240Z","detail":"CVSS 5.3 · EPSS 0.3%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-03T19:39:52.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-03T19:39:52.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":2,"title":"Red Hat: CVE-2026-63478 (moderate)","text":"isomorphic-git: isomorphic-git: Arbitrary file write via directory traversal","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-63478.json"},{"at":"2026-11-09T20:13:52.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":2,"title":"GHSA-cw2g-2vwq-88w6 / CVE-2026-63478: isomorphic-git: Path traversal via a \"..\" tree-entry name writes files outside the working directory on clone/checkout","text":"npm:isomorphic-git","url":"https://github.com/advisories/GHSA-cw2g-2vwq-88w6"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-03T20:18:16.240","score":5.3,"severity":"MEDIUM","desc":"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…","product":"","seen":1794032737048},"kev":null,"epss":{"epss":0.00295,"pct":0.22335,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}