CVE-2026-57442

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.

• CWE-22
• CWE-538

• https://github.com/bitbonsai/mcpvault/commit/0adb43901e1a08e85e14b42a8df2442fabc0b64a
• https://github.com/bitbonsai/mcpvault/commit/8795716b90d1c4090a82a58647e030763513f17e
• 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

Published

Sep 15, 2026

Last Modified

Sep 16, 2026

Status

Received

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