Path Traversal in Knowns-Dev Knowns
CVE-2026-88938
knowns through 0.33.0 fails to confine the path argument of the code.find MCP tool to the project root, allowing AI agent sessions to read source files anywhere on the host. Attackers can supply absolute paths or relative traversal sequences to the path argument and retrieve full file contents from outside the intended project directory.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/knowns-dev/knowns/security/advisories/GHSA-5cj9-fcqq-g2h7 (vendor-advisory)
- github.com/knowns-dev/knowns/blob/v0.33.0/internal/mcp/handlers/code.go (technical-description)
- github.com/knowns-dev/knowns/blob/v0.33.0/internal/mcp/handlers/code.go (technical-description)
- www.vulncheck.com/advisories/knowns-through-0.33.0-path-traversal-via-code-find… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-88938?
- CVE-2026-88938 is a medium-severity vulnerability in Knowns-Dev Knowns, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-09-10.
- How severe is CVE-2026-88938?
- Medium severity. CVSS v3 base score is 6.5 out of 10.