OS Command Injection Vulnerability in RepoMix Command Handler by DeDeveloper23
CVE-2026-5023

4.8MEDIUM

Key Information:

Vendor

Dedeveloper23

Status
Codebase-mcp
Vendor
CVE Published:
29 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5023?

A security flaw exists within the RepoMix Command Handler in DeDeveloper23's codebase-mcp that allows attackers to inject operating system commands. This vulnerability is located in the getCodebase/getRemoteCodebase/saveCodebase function of the codebase.ts file. It requires local access to exploit but poses significant risks if utilized. The issue was publicly disclosed, and despite a prior report to the project maintainers, no remedial action has yet been taken. Due to the rolling release model, the specific versions affected may vary, complicating mitigation efforts.

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Affected Version(s)

codebase-mcp 3ec749d237dd8eabbeef48657cf917275792fde6

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-2026-5023 - Proof of Concept

References

https://vuldb.com/vuln/353907
vdb-entrytechnical-description
https://vuldb.com/vuln/353907/cti
signaturepermissions-required
https://vuldb.com/submit/778348
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
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

Yinci Chen (VulDB User)
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