Critical 9.9Published Oct 12, 2026

CVE-2026-77366obsidian-tc tokens can access arbitrary configured vaults

Updated under an hour ago (2026-10-19 05:50 UTC)

Does this affect you?

It affects The-40-Thieves obsidian-tc. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.31%, higher than 22% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for The-40-Thieves obsidian-tc

Exploited in the last 30 days

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.

CVSS: 9.9 CRITICAL (v3.1, CNA)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
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.31% (percentile 22)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 12, 2026

Affected products

Affected products

The-40-Thieves obsidian-tc 40_thieves:obsidian_tc (from the name)	before 1.3.1	CNA record

References

https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq-2pq5x-refsource-confirm
https://github.com/The-40-Thieves/obsidian-tc/pull/72x-refsource-misc
https://github.com/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42d005ab05a0194x-refsource-misc
https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.