CVE-2026-84425

MEDIUM 4.3

zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-404
Vendor	zhayujie
Product	cowagent
Published	Sep 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

zhayujie / CowAgent

2.1.0 2.1.1 2.1.2 2.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/397792 vuldb.com: https://vuldb.com/vuln/397792/cti vuldb.com: https://vuldb.com/cve/CVE-2026-84425 vuldb.com: https://vuldb.com/submit/884017 github.com: https://github.com/hackerguopeng/cve/tree/main/CowAgent_Browser_Evaluate_Wait_DoS_Report

Credits

🔍 hackerguopeng (VulDB User) VulDB CNA Team