OS Command Injection Vulnerability in FishCodeTech Muteki by FishCodeTech
CVE-2026-79623

5.3MEDIUM

Key Information:

Vendor

Fishcodetech

Status
Muteki
Vendor
CVE Published:
25 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-79623?

A security flaw has been identified in the FishCodeTech Muteki application up to version 0.2.5, due to an unspecified function within the .claude/settings.json file of the Default Local Worker Backend. This vulnerability permits attackers to perform OS command injection, which can be initiated remotely, posing a significant risk to the integrity of affected systems. The exploit details have been made public, indicating a pressing need for users to take precautions. The project's future is uncertain, with statements noting plans for a refactor and discontinuation.

Affected Version(s)

Muteki 0.2.0

Muteki 0.2.1

Muteki 0.2.2

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-2026-79623 - Proof of Concept

References

https://vuldb.com/vuln/394962
vdb-entry
https://vuldb.com/vuln/394962/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-79623
third-party-advisory

CVSS V4

Score:
5.3
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

micr0softDl (VulDB User)
VulDB CNA Team
.