VULNERABILITY INTELLIGENCE

CVE-2026-42183

CVSS score6.5 MEDIUM
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-05-09
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, a nil pointer dereference in server/auth/gatekeeper.go rbacAuthorization() causes a panic (denial of service) for SSO users whose claims match a namespace-level RBAC rule but not an SSO-namespace rule, when SSO_DELEGATE_RBAC_TO_NAMESPACE=true. This issue has been patched in version 4.0.5.

Weakness classification

  • security-advisories@github.com: CWE-476

Primary references