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CVE-2026-42183

Published: May 9, 2026

Modified: May 13, 2026

PUBLISHED

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.

Vendor	Product	Versions
argoproj	argo-workflows	affected `>= 4.0.0, < 4.0.5`

Weaknesses (CWE)

References

https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq

x_refsource_CONFIRM

https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4

x_refsource_MISC

https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5

x_refsource_MISC

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