Path Traversal Vulnerability in 54yyyu MCP File Handler
CVE-2026-7811

6.9MEDIUM

Key Information:

Vendor

54yyyu

Status
Code-mcp
Vendor
CVE Published:
5 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7811?

A path traversal vulnerability has been identified in the MCP File Handler of 54yyyu's code-mcp. This flaw resides in the is_safe_path function located in the server.py file. It allows remote attackers to manipulate file paths, potentially leading to unauthorized access to sensitive files on the server. Though the issue was reported to the developers early on, no public response has been provided, putting users at risk if they remain on affected versions of the product.

Affected Version(s)

code-mcp 4cfc4643541a110c906d93635b391bf7e357f4a8

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-2026-7811 - Proof of Concept

References

https://vuldb.com/vuln/361071
vdb-entrytechnical-description
https://vuldb.com/vuln/361071/cti
signaturepermissions-required
https://vuldb.com/submit/807751
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

CPT_Penner (VulDB User)
VulDB CNA Team
.