medium6.5
CVE-2026-42183
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/argoproj/argo-workflows/v4 | >= 4.0.0, <= 4.0.4 | 4.0.5 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Argoproj | Argo Workflows | from 4.0.0 before 4.0.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p4gq-3vxj-f4jq
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq
- https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5
- https://nvd.nist.gov/vuln/detail/CVE-2026-42183