EUVD-2026-69781
GHSA-33c2-g8hf-fxjf
Severity by source
CVSS: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
Network-reachable with low privilege required; scope unchanged and impact limited to partial availability loss from resource exhaustion, no confidentiality or integrity effect.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Denial of service in zhayujie CowAgent up to version 2.1.3 allows a low-privileged remote attacker to crash or hang the agent service by sending a crafted input to the BrowserTool component in agent/tools/browser/browser_tool.py. The underlying cause (CWE-404) is improper resource shutdown or release - likely a browser subprocess or evaluation call that hangs indefinitely rather than timing out cleanly. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have low-privilege authenticated access (PR:L per CVSS 4.0) to the CowAgent instance - specifically the ability to submit agent tasks that invoke the BrowserTool. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P) reflects a moderate-severity DoS with a public exploit. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis - the vendor was unresponsive to disclosure. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Server-side request forgery in zhayujie CowAgent up to version 2.1.1 allows low-privileged authenticated users to direct
Denial of service in zhayujie CowAgent up to version 2.1.7 allows a low-privileged remote attacker to crash or degrade a
Information disclosure in zhayujie CowAgent up to version 2.1.0 exposes sensitive data to low-privileged authenticated r
Incorrect authorization in zhayujie CowAgent up to version 2.1.1 allows low-privilege authenticated remote attackers to
Same weakness CWE-404 – Improper Resource Shutdown or Release
View allSame technique Denial Of Service
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External POC / Exploit Code
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