CVE-2026-84425

zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service

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

zhayujie · CowAgent

CVSS v4.0 VULDB

2.1 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v2.0 VULDB

4.0 MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P

EPSS

0.27% chance of exploitation in the next 30 days, 19th percentile

Published

2026-09-02

Proof-of-concept exploits (1)

• hackerguopeng/cve/tree/main/CowAgent_Browser_Evaluate_Wait_DoS_Report

References

• CVE Record
• NVD entry

Related

• CVE-2026-84287
• CVE-2026-84288
• CVE-2026-84856
• CVE-2026-84886