medium4.7
CVE-2026-77361
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults.
Impact
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, read access-control list (ACL) checks use a lexical vault-relative path while containment checks use the resolved path. An in-vault symlink under an allowed glob that resolves into a denied folder can therefore bypass the read ACL and expose files in the denied folder. Exploitation requires an out-of-band-planted symlink and does not permit an escape from the vault root. Version 1.3.1 fixes the vulnerability by applying ACL checks to the resolved vault-relative path.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | obsidian-tc | < 1.3.1 | 1.3.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c5xx-h28h-f682
- https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682
- https://github.com/The-40-Thieves/obsidian-tc/pull/76
- https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920
- https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
- https://nvd.nist.gov/vuln/detail/cve-2026-77361