Threats affecting pkg:github/bitbonsai/mcpvault

CVE-2026-57442 is a path traversal vulnerability in bitbonsai mcpvault versions prior to 0.11.5. The issue arises because the PathFilter component uses root-anchored deny-list patterns that fail to restrict nested .git, .obsidian, and node_modules directories properly. This allows an attacker influencing AI-selected paths to access restricted metadata and files. The vulnerability is fixed in version 0.11.5.

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.