Medium severity6.5GHSA Advisory· Published May 9, 2026· Updated May 14, 2026
CVE-2026-42183
CVE-2026-42183
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/argoproj/argo-workflows/v4Go | >= 4.0.0, < 4.0.5 | 4.0.5 |
Affected products
4>= 4.0.0, <= 4.0.4+ 1 more
- (no CPE)range: >= 4.0.0, <= 4.0.4
- cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*range: >=4.0.0,<4.0.5
- osv-coords2 versions
>= 4.0.0, < 4.0.5+ 1 more
- (no CPE)range: >= 4.0.0, < 4.0.5
- (no CPE)range: >= 4.0.0, < 4.0.5
Patches
Vulnerability mechanics
References
5- github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4nvdPatchWEB
- github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jqnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-p4gq-3vxj-f4jqghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42183ghsaADVISORY
- github.com/argoproj/argo-workflows/releases/tag/v4.0.5nvdRelease NotesWEB
News mentions
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