What’s Vulnerable › Vulnerabilities

CVE-2026-84427: zhayujie CowAgent Bash Tool bash.py denial of service

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-02 · updated 2026-09-04
• Weakness: CWE-404

Description

A vulnerability was determined in zhayujie CowAgent up to 2.1.7. Affected is an unknown function of the file agent/tools/bash/bash.py of the component Bash Tool. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• zhayujie CowAgent: 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5 (+2)

References

• https://github.com/outlookgp/CVE/tree/main/CowAgent_Bash_Output_Buffer_DoS_Report
• https://vuldb.com/cve/CVE-2026-84427
• https://vuldb.com/submit/884137
• https://vuldb.com/vuln/397793
• https://vuldb.com/vuln/397793/cti

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