Path Traversal Vulnerability in debugmcp mcp-debugger by Debugmcp
CVE-2026-9467

5.3MEDIUM

Key Information:

Vendor

Debugmcp

Status
Mcp-debugger
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9467?

A vulnerability exists in the debugmcp mcp-debugger up to version 0.20.0, specifically within the handleGetSourceContext function located in the src/server.ts file. This flaw allows an attacker to perform path traversal attacks remotely, potentially exposing sensitive file paths and contents. As the exploit is publicly available, it raises significant concerns for users of the affected product. The vendor has been notified about this issue but has not provided a response.

Affected Version(s)

mcp-debugger 0.1

mcp-debugger 0.2

mcp-debugger 0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-9467 - Proof of Concept

References

https://vuldb.com/vuln/365448
vdb-entrytechnical-description
https://vuldb.com/vuln/365448/cti
signaturepermissions-required
https://vuldb.com/submit/813980
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

KkKkKO (VulDB User)
VulDB CNA Team
.