CVE-2026-57441

CVE-2026-57441 · MCPVault: PathFilter restricted-directory deny-list bypass via case and trailing dot/space equivalence

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MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.4, PathFilter in src/pathfilter.ts compiles restricted-directory patterns case-sensitively and compares paths without canonicalizing filesystem-equivalent segment names. On case-insensitive macOS and Windows filesystems, case variants of .git, .obsidian, or node_modules pass both isAllowed() and isAllowedForListing() even though the operating system opens the restricted directory, and Windows trailing dots or spaces provide the same bypass. An attacker who influences a path selected by an AI agent can use the bypass in read, write, move, search, or listing operations to expose or modify sensitive repository and Obsidian metadata. Vault-root .. containment is not affected. This issue is fixed in version 0.11.4.

CVSS 8.4 · Hoch · EPSS 0,2% · Korrektur verfügbar

Veröffentlicht

2026-09-15T17:49:10.118Z

Aktualisiert

2026-09-15T19:43:58.303Z

Technologie-Stack: node

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