Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/bitbonsai/mcpvault/commit/0adb43901e1a08e85e14b42a8df2442fabc
- https://github.com/bitbonsai/mcpvault/commit/8795716b90d1c4090a82a58647e03076351
- https://github.com/bitbonsai/mcpvault/issues/128
- https://github.com/bitbonsai/mcpvault/security/advisories/GHSA-9c83-rr99-vfwj
- https://github.com/bitbonsai/mcpvault/issues/128
FAQ
What is CVE-2026-57442?
CVE-2026-57442 is a documented vulnerability. 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...
How severe is CVE-2026-57442?
CVSS scoring is not yet available for CVE-2026-57442. Check NVD for updates.
Is there a patch for CVE-2026-57442?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.