CVE-2026-77362

MEDIUM 4.3

obsidian-tc bridge tools expose data outside the read ACL

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-200 CWE-863
Vendor	the-40-thieves
Product	obsidian-tc
Published	Oct 13, 2026
Last Updated	Oct 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

The-40-Thieves / obsidian-tc

< 1.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-43r2-c7g8-prc8 github.com: https://github.com/The-40-Thieves/obsidian-tc/pull/75 github.com: https://github.com/The-40-Thieves/obsidian-tc/commit/5ab2109274acf0070601fa71a62b14ddc9652309 github.com: https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1