CVE-2026-77361

MEDIUM 4.7

obsidian-tc symlink path mismatch bypasses read ACL restrictions

CVSS Score

4.7

EPSS Score

0.0%

EPSS Percentile

0th

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	CWE-59 CWE-863
Vendor	the-40-thieves
Product	obsidian-tc
Published	Oct 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

The-40-Thieves / obsidian-tc

< 1.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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