CVE-2026-9467 debugmcp mcp-debugger server.ts handleGetSourceContext path traversal
Remote attackers can exploit a path traversal flaw in the debugmcp mcp-debugger to read arbitrary files from the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9467?
CVE-2026-9467 is a medium-severity path traversal vulnerability in debugmcp mcp-debugger, published on 25 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-9467?
How do I fix CVE-2026-9467?
No fix has been published for CVE-2026-9467 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-9467 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9467 exists.
Sources
Also known as GHSA-8744-whr8-7m8p.