CVE-2026-42183

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-42183
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42183.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42183
Aliases
Downstream
CGA (42)
MINI (12)
openSUSE (1)
Related
Published
2026-05-09T03:44:10Z
Modified
2026-10-28T02:30:45Z
Severity
  • 2.3 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42183.json"
}
References

Affected packages

Git / github.com/argoproj/argo-workflows

Affected ranges

Type
GIT
Repo
https://github.com/argoproj/argo-workflows
Events
Introduced
a8bff4a72130bc1a13d95c6f73ff3fafec880287
Fixed
0ab1452144d8f4d57c50b37ce50dad218868e950
Fixed
c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*",
            "range": [
                {
                    "introduced": "4.0.0"
                },
                {
                    "fixed": "4.0.5"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v4.0.5",
            "range": [
                {
                    "fixed": "0ab1452144d8f4d57c50b37ce50dad218868e950"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42183.json"