---
id: CVE-2026-77366
title: >-
  obsidian-tc is a governed, agent-ready Model Context Protocol server for
  Obsidian vaults
summary: >-
  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)…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-639
  - CWE-863
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T18:17:23.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77366'
references:
  - url: >-
      https://github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42d005ab05a0194
    label: security-advisories@github.com
  - url: 'https://github.com/The-40-Thieves/obsidian-tc/pull/72'
    label: security-advisories@github.com
  - url: 'https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq-2pq5
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-12T19:01:57.230Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.