{"id":"CVE-2026-47839","state":"PUBLISHED","title":"Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin","description":"A vulnerability allows users authenticating through a federated OIDC provider to obtain the uaa.admin scope despite operators restricting that provider through externalGroupsWhitelist configuration. The issue occurs specifically when an OIDC identity provider uses groupMappingMode: AS_SCOPES with a wildcard externalGroupsWhitelist entry.","publishedAt":"2026-09-11T09:14:09.466Z","updatedAt":"2026-09-11T14:24:54.282Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"vmware"},"assigner":"vmware","products":["Cloud Foundry Foundation UAA","Cloud Foundry Foundation cf-deployment"],"affected":[{"vendor":"Cloud Foundry Foundation","product":"UAA","versions":[{"version":"0","status":"affected","lessThanOrEqual":"77.30.0","versionType":"custom"},{"version":"77.31.0","status":"unaffected"}]},{"vendor":"Cloud Foundry Foundation","product":"cf-deployment","versions":[{"version":"0","status":"affected","lessThanOrEqual":"48.9.0","versionType":"custom"},{"version":"48.10.0","status":"unaffected"}]}],"references":["https://www.cloudfoundry.org/blog/cve-2026-47839-federated-oidc-users-can-bypass-externalgroupswhitelist-to-gain-uaa-admin/"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/47xxx/CVE-2026-47839.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47839","state":"PUBLISHED","datePublished":"2026-09-11T09:14:09.466Z","dateUpdated":"2026-09-11T14:24:54.282Z","assignerShortName":"vmware","assignerOrgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateReserved":"2026-05-20T10:00:51.003Z"},"containers":{"cna":{"title":"Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin","descriptions":[{"lang":"en","value":"A vulnerability allows users authenticating through a federated OIDC provider to obtain the uaa.admin scope despite operators restricting that provider through externalGroupsWhitelist configuration. The issue occurs specifically when an OIDC identity provider uses groupMappingMode: AS_SCOPES with a wildcard externalGroupsWhitelist entry."}],"affected":[{"vendor":"Cloud Foundry Foundation","product":"UAA","versions":[{"version":"0","status":"affected","lessThanOrEqual":"77.30.0","versionType":"custom"},{"version":"77.31.0","status":"unaffected"}]},{"vendor":"Cloud Foundry Foundation","product":"cf-deployment","versions":[{"version":"0","status":"affected","lessThanOrEqual":"48.9.0","versionType":"custom"},{"version":"48.10.0","status":"unaffected"}]}],"references":[{"url":"https://www.cloudfoundry.org/blog/cve-2026-47839-federated-oidc-users-can-bypass-externalgroupswhitelist-to-gain-uaa-admin/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.2,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"providerMetadata":{"shortName":"vmware","orgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateUpdated":"2026-09-11T09:20:14.343Z"},"credits":[{"lang":"en","value":"Tanzu at Broadcom (responsible disclosure)","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-11T12:59:13.491445Z","id":"CVE-2026-47839","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","type":"CWE","lang":"en","description":"CWE-284 Improper Access Control"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-11T14:24:54.282Z"}}]}}}