Vulnerability · Published Oct 13, 2026 · Assigned by GitHub_M

CVE-2026-77362obsidian-tc bridge tools expose data outside the read ACL

Medium 4.3

In plain English

A medium-severity information exposure in obsidian-tc from The-40-Thieves. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 90.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	obsidian-tc	1.3.1	GHSA-43r2-c7g8-prc8

Affected products (as reported)

Vendor	Product	Versions
The-40-Thieves	obsidian-tc	< 1.3.1

Weakness: CWE-200, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

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