Denial of Service Vulnerability in zhayujie CowAgent Product
CVE-2026-84425

5.3MEDIUM

Key Information:

Vendor

Zhayujie

Status
Cowagent
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84425?

A vulnerability exists in the zhayujie CowAgent, specifically in the Browser Tool function of the browser_tool.py file. This flaw allows an attacker to execute a denial of service attack, potentially disrupting service and making the product unusable. The exploit can be initiated remotely, heightening the risk for users. Public awareness of this vulnerability has been raised, and despite early notification to the vendor, there has been no response or remedial action taken to mitigate the risks associated with the vulnerability.

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-2026-84425 - Proof of Concept

References

https://vuldb.com/vuln/397792
vdb-entrytechnical-description
https://vuldb.com/vuln/397792/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84425
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

hackerguopeng (VulDB User)
VulDB CNA Team
.