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CVE-2026-84425

zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service

MEDIUM
4.3
CVSS Score
Published: September 2, 2026 at 12:15 AM UTC
Updated: September 2, 2026 at 02:12 PM UTC
1 product affected across 1 vendorCowAgent

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

A vulnerability was found in zhayujie CowAgent up to 2.1.3. This impacts the function BrowserTool of the file agent/tools/browser/browser_tool.py of the component Browser Tool. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/397792
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/397792/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-84425
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/884017
Exploit
Source: cverecord
https://github.com/hackerguopeng/cve/tree/main/CowAgent_Browser_Evaluate_Wait_DoS_Report

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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