What is CVE-2026-77364?

CVE-2026-77364 is a medium-severity vulnerability in The-40-Thieves Obsidian-Tc, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-10-12.

How severe is CVE-2026-77364?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in The-40-Thieves Obsidian-Tc

CVE-2026-77364

obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, undefined readPaths and writePaths settings allow all paths, strictReadDefault does not protect direct requests, and the .obsidian, .git, and .trash control directories are excluded only during enumeration. An authenticated caller can directly read sensitive files such as .obsidian/plugins/*/data.json, potentially exposing plugin API keys, Obsidian Sync passwords, and other in-vault data. Version 1.3.1 fixes the vulnerability by denying the control directories by default and enforcing strictReadDefault on direct request paths.

Vulnerability class: Information Disclosure

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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-2026-77364?: CVE-2026-77364 is a medium-severity vulnerability in The-40-Thieves Obsidian-Tc, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-10-12.
How severe is CVE-2026-77364?: Medium severity. CVSS v3 base score is 6.5 out of 10.