Medium severity · published Sep 2, 2026
CVE-2026-84425
zhayujie CowAgent Browser Tool browser_tool.py BrowserTool denial of service
4.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
CowAgent · zhayujie
2.1.0; 2.1.1; 2.1.2; 2.1.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84425
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84425
github.com
https://github.com/hackerguopeng/cve/tree/main/CowAgent_Browser_Evaluate_Wait_DoS_Report
vuldb.com
https://vuldb.com/cve/CVE-2026-84425
vuldb.com
https://vuldb.com/submit/884017
vuldb.com
https://vuldb.com/vuln/397792
vuldb.com
https://vuldb.com/vuln/397792/cti
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