{"id":"CVE-2019-3902","aliases":["GHSA-mq66-vcfc-8246","PYSEC-2019-188"],"url":"https://o3.security/vulnerability/CVE-2019-3902","summary":"Mercurial Path Traversal/Link Following vulnerability","details":"A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.","published":"2019-04-22T16:29:01.913Z","modified":"2026-04-16T04:31:25.932763142Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":{"score":0.01425,"percentile":0.70474,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mercurial","fixedVersion":"4.9"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html"},{"type":"WEB","url":"https://usn.ubuntu.com/4086-1/"},{"type":"ADVISORY","url":"https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.9_.282019-02-01.29"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/04/msg00024.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3902"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-16T04:31:25.932763142Z"}}