MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.5, PathFilter in src/pathfilter.ts uses root-anchored deny-list patterns, so nested .git, .obsidian, and node_modules path segments do not match the restriction and pass both isAllowed() and isAllowedForListing(). An attacker who influences a path selected by an AI agent can traverse nested repository or Obsidian metadata, read remote URLs or embedded tokens, or cause nested node_modules content to pollute the listAllTags index.
This issue is fixed in version 0.11.5.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/bitbonsai/mcpvault/commit/0adb43901e1a08e85e14b42a8df2442fab…
security-advisories@github.com
https://github.com/bitbonsai/mcpvault/commit/8795716b90d1c4090a82a58647e0307635…
security-advisories@github.com
https://github.com/bitbonsai/mcpvault/issues/128
security-advisories@github.com
https://github.com/bitbonsai/mcpvault/security/advisories/GHSA-9c83-rr99-vfwj
security-advisories@github.com