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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| argoproj | argo-workflows | >= 4.0.0, < 4.0.5 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | argo-workflows-3.7 +1 | 3.7.15-r2 | — |
| Wolfi rolling | kubeflow-pipelines-apiserver +3 | 2.16.1-r15 | — |
| Wolfi rolling | kubeflow-pipelines-metadata-writer-compat | 2.17.2-r4 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/argoproj/argo-workflows | all versions | — | GO-2026-5527 |
| Go | github.com/argoproj/argo-workflows/v2 | all versions | — | GO-2026-5527 |
| Go | github.com/argoproj/argo-workflows/v3 | all versions | — | GO-2026-5527 |
| Go | github.com/argoproj/argo-workflows/v4 | >= 4.0.0, < 4.0.5 | 4.0.5 | GHSA-p4gq-3vxj-f4jq |
Advisories 1
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026