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Medium · 4.7 CVE-2026-77361 EUVD-2026-98694GHSA-c5xx-h28h-f682

obsidian-tc symlink path mismatch bypasses read ACL restrictions

Published Oct 13, 2026 · Updated Oct 16, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
The-40-Thieves obsidian-tc < 1.3.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm obsidian-tc < 1.3.1 1.3.1 GHSA-c5xx-h28h-f682

References