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Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
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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{
"vendor": "argoproj",
"product": "argo-workflows",
"versions": [
{
"version": ">= 4.0.0, < 4.0.5",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON