{"cve":"CVE-2026-42183","nvd":{"published":"2026-05-09T04:16:23.810","modified":"2026-07-24T21:10:00.143","status":"Analyzed","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.","cvss_v4":{"vector":"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","score":2.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-476"],"references":["https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4","https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5","https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq"],"products":["argoproj:argo_workflows"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-42183","score":0.00377,"percentile":0.31694,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p4gq-3vxj-f4jq","url":"https://osv.dev/vulnerability/GHSA-p4gq-3vxj-f4jq","summary":"Argo Affected by SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)","modified":"2026-09-10T03:50:47.112917011Z","packages":[{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v4","purl":"pkg:golang/github.com/argoproj/argo-workflows/v4","ranges":[">=4.0.0 <4.0.5"],"fixed":["4.0.5"]}]},{"id":"GO-2026-5527","url":"https://osv.dev/vulnerability/GO-2026-5527","summary":"Argo Affected by SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go) in github.com/argoproj/argo-workflows","modified":"2026-07-02T14:44:23.939425072Z","packages":[{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows","purl":"pkg:golang/github.com/argoproj/argo-workflows","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v2","purl":"pkg:golang/github.com/argoproj/argo-workflows/v2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v3","purl":"pkg:golang/github.com/argoproj/argo-workflows/v3","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v4","purl":"pkg:golang/github.com/argoproj/argo-workflows/v4","ranges":[">=4.0.0 <4.0.5"],"fixed":["4.0.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}