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

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS No score.

Timeline

This record came from the full history of the GitHub Advisory Database, published 8 Sept 2026. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-qjrq-cvv4-3g9w
• OSV: GHSA-qjrq-cvv4-3g9w
• github.com/knowns-dev/knowns/security/advisories/GHSA-9gfj-28hw-jchp
• nvd.nist.gov/vuln/detail/CVE-2026-86439
• github.com/knowns-dev/knowns/commit/09c5a96fd5817b941dc86669278c1a17db10ed4e
• github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/doc_store.go#L124-L129
• github.com/knowns-dev/knowns/blob/v0.29.1/internal/storage/memory_store.go#L203-L211
• github.com/knowns-dev/knowns/releases/tag/v0.30.0
• www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-mcp-doc-and-memory-tools

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.