Vulnerability in Zhayujie Cowagent
CVE-2026-84427
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Zhayujie Cowagent — versions 2.1.0, 2.1.1, 2.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/397793 (vdb-entry)
- vuldb.com/vuln/397793/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-84427 (third-party-advisory)
- vuldb.com/submit/884137 (third-party-advisory)
- github.com/outlookgp/CVE/tree/main/CowAgent_Bash_Output_Buffer_DoS_Report (exploit)
Frequently asked questions
- What is CVE-2026-84427?
- CVE-2026-84427 is a medium-severity vulnerability in Zhayujie Cowagent, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-09-02.
- How severe is CVE-2026-84427?
- Medium severity. CVSS v3 base score is 4.3 out of 10.