Bug 2468445 (CVE-2026-42183) - CVE-2026-42183 github.com/argoproj/argo-workflows: Argo Workflows: Denial of Service via nil pointer dereference for SSO users
Summary: CVE-2026-42183 github.com/argoproj/argo-workflows: Argo Workflows: Denial of ...
Keywords:
Status: NEW
Alias: CVE-2026-42183
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-09 05:01 UTC by OSIDB Bzimport
Modified: 2026-05-18 14:34 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-09 05:01:47 UTC 
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.
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