CVE-2026-42183

A flaw was found in Argo Workflows. This flaw, a nil pointer dereference in the rbacAuthorization function, affects Single Sign-On SSO users. When SSODELEGATERBACTONAMESPACE is enabled, an authenticated SSO user whose claims match a namespace-level Role-Based Access Control RBAC rule but not an...

CVE-2026-42183: NULL Pointer Dereference

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...