{"schemaVersion":3,"id":"CVE-2026-93991","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-09-19T22:58:11.895Z","modified":"2026-09-21T20:46:52.269Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.3,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.3,"severity":"high","vector":"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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.7,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.3,"severity":"high","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.7,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00436,"percentile":0.36542,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.11000000000000003,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00326},"history":[{"date":"2026-09-20T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00436,"percentile":0.36542}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00326,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00436,"percentile":0.36542}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key","description":"The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/639.html"}],"affected":[{"vendor":"argoproj","product":"argo-workflows","name":"argo-workflows","label":"argo-workflows","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.1.0, < 4.1.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.1.0, < 4.1.4","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"argo-workflows","label":"Argo Workflows","category":"server-app"}},"hubHref":"/vendor/argoproj/argo-workflows"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4","label":"github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4","hostname":"github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9","label":"github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9","hostname":"github.com","tags":["Patch"]},{"url":"https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4","label":"github.com/argoproj/argo-workflows/releases/tag/v4.1.4","hostname":"github.com","tags":["Release Notes"]},{"url":"https://github.com/argoproj/argo-workflows","label":"github.com/argoproj/argo-workflows","hostname":"github.com","tags":["Product"]},{"url":"https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector","label":"www.vulncheck.com/advisories/…","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-19T22:58:11.895Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-21T20:46:52.269Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:47:18.524Z","stale":false,"partial":false}}