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Critical · 9.9 CVE-2026-77366 EUVD-2026-97737GHSA-84c9-qqpq-2pq5

obsidian-tc tokens can access arbitrary configured vaults

Published Oct 12, 2026 · Updated Oct 13, 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, tool dispatch does not compare the caller-controlled input.vault value with the vault bound to the caller, the JSON Web Token (JWT) has no vault claim, and the folder access-control list is shared globally. Any valid token can therefore select another configured vault and read, write, or delete its contents through affected tools. Version 1.3.1 fixes the vulnerability by binding tokens and request context to a vault and rejecting mismatched input.vault values before scope checks.

Affected products

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

Affected packages

EcosystemPackageAffectedFixedRecord
npm obsidian-tc < 1.3.1 1.3.1 GHSA-84c9-qqpq-2pq5

References