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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
the-40-thieves:obsidian-tc
References 4
https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqp…
https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq-2pq5
https://github.com/The-40-Thieves/obsidian-tc/pull/72
https://github.com/The-40-Thieves/obsidian-tc/pull/72
https://github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a4…
https://github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42d005ab05a0194
https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1