CVE-2026-42183
Published:May 09, 2026
Updated:May 16, 2026
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
https://github.com/argoproj/argo-workflows.git (GITHUB):
Affected version(s) >=v4.0.0 <v4.0.5Fix Suggestion:
Update to version v4.0.5github.com/argoproj/argo-workflows/v4 (GO):
Affected version(s) >=v4.0.0-20260501053831-80dc102f42b0 <v4.0.5Fix Suggestion:
Update to version v4.0.5Related Resources (5)
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Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
NULL Pointer Dereference
EPSS
Base Score:
0.05