Vulnerability · Published May 25, 2026 · Assigned by VulDB

CVE-2026-9467debugmcp mcp-debugger server.ts handleGetSourceContext path traversal

Medium 4.3

In plain English

A medium-severity path traversal in mcp-debugger from debugmcp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 61.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
debugmcp	mcp-debugger	0.10.20.30.40.50.60.70.8

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-365448 | debugmcp mcp-debugger server.ts handleGetSourceContext path traversal vdb-entry, technical-description
VDB-365448 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #813980 | debugmcp mcp-debugger 3e83906c8358965efd683c734e94a75d338400fa Path Traversal third-party-advisory
https://github.com/hyk6225/public_exp/issues/1 exploit, issue-tracking