Knowns Unrestricted Path Traversal leading to out-of-bounds arbitrary .md file read, write, and deletion in MCP Docs + Memory Tools

[ Description ]Official description

knowns versions before 0.30.0 fail to validate filesystem paths in MCP tool arguments, allowing attackers to read, create, overwrite and delete files outside the project directory. Attackers can supply path arguments containing directory traversal sequences to access arbitrary Markdown files accessible to the server process.

[ Fixes ]Fixes and patches

• knowns 0.30.0Fixed version · GitHub Advisories · npm package knowns: upgrade to 0.30.0 or later (affected <= 0.29.1)

[ Packages ]Affected open-source packages

• knowns npmAffected <= 0.29.1 · fixed in 0.30.0 · GHSA-9gfj-28hw-jchp

[ References ]References

• github.com/knowns-dev/knowns/security/advisories/GHSA-9gfj-28hw-jchpvendor-advisory
• github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/doc_store.gotechnical-description
• github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/memory_store.gotechnical-description
• github.com/knowns-dev/knowns/commit/09c5a96fd5817b941dc86669278c1a17db10ed4epatch
• github.com/knowns-dev/knowns/releases/tag/v0.30.0release-notes
• www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-mcp-doc-and-memory…third-party-advisory