CVE-2026-77361

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.

• CWE-59
• CWE-863

• https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920
• https://github.com/The-40-Thieves/obsidian-tc/pull/76
• https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
• https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682

Published

Oct 13, 2026

Last Modified

Oct 13, 2026

Status

Received

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