Medium 6.5Published May 9, 2026

CVE-2026-42183Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.

Updated under an hour ago (2026-10-19 08:10 UTC)

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It affects argoproj argo_workflows. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for argoproj argo_workflows

Exploited in the last 30 days

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: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

argoproj argo_workflows argoproj:argo_workflows	from 4.0.0 before 4.0.5	NVD

References

https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4patch
https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5release-notes
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jqexploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.