CVE-2026-86439
CVE-2026-86439 · knowns before 0.30.0 Path Traversal via MCP doc and memory tools
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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.
CVSS 8.7 · Élevée · EPSS 1,1% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
Sources originales
- https://github.com/knowns-dev/knowns/security/advisories/GHSA-9gfj-28hw-jchp
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/doc_store.go#L124-L129
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/memory_store.go#L203-L211
- https://github.com/knowns-dev/knowns/commit/09c5a96fd5817b941dc86669278c1a17db10ed4e
- https://github.com/knowns-dev/knowns/releases/tag/v0.30.0
- https://www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-mcp-doc-and-memory-tools
- https://nvd.nist.gov/vuln/detail/CVE-2026-86439