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CVE-2026-57442 is a path restriction flaw in MCPVault affecting the npm package @bitbonsai/mcpvault. The vulnerable PathFilter logic restricted access to sensitive directory names such as .git, .obsidian, and node_modules only when those directories appeared at the vault root. As a result, the filter failed to block the same restricted directory names when they appeared deeper in the directory hierarchy, allowing traversal into nested sensitive directories that should have been excluded from agent access and indexing.
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