obsidian-tc tokens can access arbitrary configured vaults

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77366
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 18:17:23 UTC
Updated2026-10-12 18:17:23 UTC
Descriptionobsidian-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.

Risk And Classification

Primary CVSS: v3.1 9.9 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem Types: CWE-639 | CWE-863 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The-40-Thieves Obsidian-tc affected < 1.3.1 Not specified

References

ReferenceSourceLinkTags
github.com/The-40-Thieves/obsidian-tc/pull/72 [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1 [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq... [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42... [email protected] github.com
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