obsidian-tc fail-open default ACL exposes Obsidian control-directory secrets

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77364
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 18:17:23 UTC
Updated2026-10-12 18:17:23 UTC
Descriptionobsidian-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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-200 | CWE-276 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-276 CWE-276: Incorrect Default Permissions

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The-40-Thieves Obsidian-tc affected < 1.3.1 Not specified

References

ReferenceSourceLinkTags
github.com/The-40-Thieves/obsidian-tc/commit/74de320ddea855e1dec47d67bea... [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-cvp8-vvgf... [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1 [email protected] github.com
github.com/The-40-Thieves/obsidian-tc/pull/73 [email protected] github.com
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