CVE-2026-77361

obsidian-tc symlink path mismatch bypasses read ACL restrictions

Published Oct 13, 2026 CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-c5xx-h28h-f682 obsidian-tc : Symlink read-ACL scope bypass via lexical path checks
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared The-40-thieves
The-40-thieves obsidian-tc
Vendors & Products The-40-thieves
The-40-thieves obsidian-tc
Type Values Removed Values Added
Description 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.
Title obsidian-tc symlink path mismatch bypasses read ACL restrictions
Weaknesses CWE-59
CWE-863
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 16, 2026, 9:58 PM
Reserved
Aug 20, 2026, 7:28 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 2:17 PM
Modified
Oct 16, 2026, 10:17 PM