Resource exhaustion in Argo Workflows - #VU126911
Published: April 23, 2026
Vulnerability identifier: #VU126911
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Argo
Affected software:
Argo Workflows
Argo Workflows
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled memory consumption in the webhook interceptor when handling requests to the /api/v1/events/ endpoint with an extremely large body before authentication or signature verification. A remote attacker can send a specially crafted request with an extremely large body to cause a denial of service.
The issue can cause the Argo Server to allocate excessive memory and potentially crash with an out-of-memory condition.
Remediation
Install security update from vendor's website.