Denial of Service Vulnerability in zhayujie CowAgent Bash Tool
CVE-2026-84427

5.3MEDIUM

Key Information:

Vendor

Zhayujie

Status
Cowagent
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84427?

A vulnerability exists in the zhayujie CowAgent Bash Tool, particularly affecting the function within the file agent/tools/bash/bash.py. This vulnerability allows a remote attacker to execute a malicious manipulation, potentially leading to denial of service for the application. Due to a lack of response from the vendor following public disclosure, this exploit remains a significant concern for users operating on versions up to 2.1.7 of CowAgent.

Affected Version(s)

CowAgent 2.1.0

CowAgent 2.1.1

CowAgent 2.1.2

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-2026-84427 - Proof of Concept

References

https://vuldb.com/vuln/397793
vdb-entry
https://vuldb.com/vuln/397793/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84427
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

outlookgp (VulDB User)
VulDB CNA Team
.