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CVE-2026-84425— zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service

Quick assessment

Affected
zhayujie CowAgent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 zhayujie CowAgent（版本 2.1.3 及之前）中发现一个漏洞，影响组件“Browser Tool”中文件 的 功能。执行相关操作可导致拒绝服务（DoS）。该攻击可远程发起。该利用方式已公开，可能被利用。供应商此前曾就此次披露事宜被联系，但一直未作任何回应。

CVSS 4.3 · Medium EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
zhayujie CowAgent 2.1.0 affected
2.1.1 affected
2.1.2 affected
2.1.3 affected
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I. Basic Information for CVE-2026-84425

Vulnerability Information
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Vulnerability Title
zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zhayujie CowAgent 2.1.0 cpe:2.3:a:zhayujie:cowagent:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-84425

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-84425

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Other References for CVE-2026-84425 (4)

IV. Related Vulnerabilities

Same product: CowAgent
Same vendor: zhayujie
Same weakness: CWE-404

V. Comments for CVE-2026-84425

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