{"id":"CVE-2026-93991","summary":"Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector","details":"Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a negated namespace field selector to retrieve archived workflows from all other namespaces, exposing spec arguments, parameter values, and annotations.","aliases":["GHSA-q65w-j2vp-47c4"],"modified":"2026-09-24T03:30:56.950336296Z","published":"2026-09-19T22:58:11.895Z","database_specific":{"cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93991.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93991.json"},{"type":"ADVISORY","url":"https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4"},{"type":"ADVISORY","url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93991"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector"},{"type":"FIX","url":"https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9"},{"type":"PACKAGE","url":"https://github.com/argoproj/argo-workflows"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/argoproj/argo-workflows","events":[{"introduced":"e5ed20d5cb54d4708d5aeb29148b3e49922f795c"},{"fixed":"b5b4d665e9be9b87c115f943584c3e0ae96fe073"}],"database_specific":{"extracted_events":[{"introduced":"4.1.0"},{"fixed":"4.1.4"}],"source":"AFFECTED_FIELD"}}],"versions":["v4.1.3","v4.1.2","v4.1.1","v4.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93991.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"}]}