obsidian-tc tokens can access arbitrary configured vaults
Impact
Tool dispatch did not check the caller-supplied input.vault against the caller's bound vault (ctx.vaultId); the folder ACL was a single global instance and the JWT carried no vault claim. As a result, any valid token could read, write, or delete any configured vault by passing input.vault, defeating multi-tenant isolation across ~90 tool sites. (resources/read was the only surface that already guarded this.)
Patches
Fixed in 1.3.1 (the fix was developed on the v1.3.0 tag, which never published to npm; 1.3.1 is the first published release with the fix). Upgrade to >= 1.3.1.
Workarounds
Run a single vault per server process, or isolate each tenant on a separate process/credential.
Fix
A central input.vault === ctx.vaultId guard was added in dispatch before the scope check.
What to do
Upgrade to >= 1.3.1. As a workaround, run a single vault per server process, or isolate each tenant on a separate process/credential.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | obsidian-tc | < 1.3.1 | 1.3.1 |
References
- 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/commit/38b4992e87dc2715564236e1a42d005ab05a0194
- https://github.com/The-40-Thieves/obsidian-tc
- https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
- https://nvd.nist.gov/vuln/detail/cve-2026-77366
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-639, CWE-863- Platform
- npm
- Package
obsidian-tc- Disclosed
- 23.10.2026
- Updated
- 24.10.2026 00:00
Sources and licenses · Edited or translated by DockRay; source rights and applicable licenses are retained.
OSV / GitHub Advisory Database - GHSA-84c9-qqpq-2pq5 - CC BY 4.0
Vulnerability history: obsidian-tc
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 10.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- Medium 3
Disclosures per year
- 2026: 5
-
obsidian-tc tokens can access arbitrary configured vaults this entry
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