Path Traversal in Debugmcp Mcp-Debugger
CVE-2026-9467
A vulnerability was identified in debugmcp mcp-debugger up to 0.20.0. Impacted is the function handleGetSourceContext of the file src/server.ts. The manipulation leads to path traversal. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Debugmcp Mcp-Debugger — versions 0.1, 0.2, 0.3
Weakness classification (CWE)
References
- vuldb.com/vuln/365448 (technical-description, vdb-entry)
- vuldb.com/vuln/365448/cti (signature, permissions-required)
- vuldb.com/submit/813980 (third-party-advisory)
- github.com/hyk6225/public_exp/issues/1 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-9467?
- CVE-2026-9467 is a medium-severity vulnerability in Debugmcp Mcp-Debugger, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-05-25.
- How severe is CVE-2026-9467?
- Medium severity. CVSS v3 base score is 4.3 out of 10.