CVE-2026-77366
obsidian-tc tokens can access arbitrary configured vaults
CVSS Score
9.9
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, 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.
| CWE | CWE-639 CWE-863 |
| Vendor | the-40-thieves |
| Product | obsidian-tc |
| Published | Oct 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
The-40-Thieves / obsidian-tc
< 1.3.1
References
github.com: https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq-2pq5 github.com: https://github.com/The-40-Thieves/obsidian-tc/pull/72 github.com: https://github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42d005ab05a0194 github.com: https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1