{"id":"CVE-2026-77361","aliases":["GHSA-c5xx-h28h-f682"],"url":"https://o3.security/vulnerability/CVE-2026-77361","summary":"obsidian-tc symlink path mismatch bypasses read ACL restrictions","details":"### Impact\nACL checks ran on the lexical vault-relative path while containment used the realpath. An in-vault symlink placed under an allowed glob, whose realpath resolved into a denied folder, passed the read ACL — an intra-vault read-ACL-scope bypass. It requires an out-of-band-planted symlink (no MCP tool creates one) and is not a vault-root escape.\n\n### Patches\nFixed in **1.3.1**. Upgrade to `>= 1.3.1`. ACL enforcement now derives the realpath vault-relative path and feeds a single unified predicate at every site.\n\n### Workarounds\nDo not permit untrusted symlinks inside the vault.","published":"2026-10-13T14:00:39.982Z","modified":"2026-10-21T02:59:54.863507670Z","cvss":{"score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"obsidian-tc","fixedVersion":"1.3.1"}],"fix":{"url":"https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920","label":"The-40-Thieves/obsidian-tc@c81d168"},"references":[{"type":"WEB","url":"https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77361.json"},{"type":"ADVISORY","url":"https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77361"},{"type":"FIX","url":"https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920"},{"type":"FIX","url":"https://github.com/The-40-Thieves/obsidian-tc/pull/76"},{"type":"PACKAGE","url":"https://github.com/The-40-Thieves/obsidian-tc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/cve-2026-77361"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:59:54.863507670Z"}}