2.3Low
CVE-2026-42183Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)
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 (CWE):
CWE-476
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| argoproj | argo-workflows | >= 4.0.0, < 4.0.5 |
References and patches
CPE matches (NVD) (1)
cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*≥ 4.0.0 < 4.0.5