CVE-2026-42183 (GCVE-0-2026-42183)

Vulnerability from cvelistv5 – Published: 2026-05-09 03:44 – Updated: 2026-05-09 03:44
VLAI?
Title
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)
Summary
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.
Severity ?
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
argoproj argo-workflows Affected: >= 4.0.0, < 4.0.5
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        "discovery": "UNKNOWN"
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      "title": "Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)"
    }
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    "dateReserved": "2026-04-25T01:53:21.582Z",
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  }
}


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