CVE-2026-77361 PUBLISHED

obsidian-tc symlink path mismatch bypasses read ACL restrictions

Assigner: GitHub_M
Reserved: 20.08.2026 Published: 13.10.2026 Updated: 13.10.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 4.7

Product Status

Vendor The-40-Thieves
Product obsidian-tc
Versions
  • Version < 1.3.1 is affected

References

Problem Types

  • CWE-59: Improper Link Resolution Before File Access ('Link Following') CWE
  • CWE-863: Incorrect Authorization CWE