Auth bypass in The-40-Thieves Obsidian-Tc
CVE-2026-77362
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, bridge tools do not consistently apply the read access-control list (ACL) to every returned field. The tasks_filter tool exposes group counts derived from denied notes, makemd_query passes unfiltered sibling result fields through, and list_templates exposes template paths and parsed user-function bodies without a read-whitelist check. An authenticated caller can consequently infer or read data from notes outside the caller's read ACL. Version 1.3.1 fixes the vulnerability by filtering path-attributable fields and applying the read whitelist to list_templates.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- The-40-Thieves Obsidian-Tc — versions < 1.3.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-77362?
- CVE-2026-77362 is a medium-severity vulnerability in The-40-Thieves Obsidian-Tc, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-10-13.
- How severe is CVE-2026-77362?
- Medium severity. CVSS v3 base score is 4.3 out of 10.