Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Argoproj | Argo Workflows | >= 4.0.0, < 4.0.5 |
Related Weaknesses (CWE)
References
- https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c80Patch
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5Release Notes
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4ExploitVendor Advisory
FAQ
What is CVE-2026-42183?
CVE-2026-42183 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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/ga...
How severe is CVE-2026-42183?
CVE-2026-42183 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42183?
Check the references section above for vendor advisories and patch information. Affected products include: Argoproj Argo Workflows.