CVE-2026-77361: obsidian-tc : Symlink read-ACL scope bypass via lexical path checks
ACL 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.
References
- github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920
- github.com/The-40-Thieves/obsidian-tc/pull/76
- github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
- github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682
- github.com/advisories/GHSA-c5xx-h28h-f682
- nvd.nist.gov/vuln/detail/CVE-2026-77361
- nvd.nist.gov/vuln/detail/cve-2026-77361
Code Behaviors & Features
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