CVE-2026-47839

9.2 criticalEPSS 0.3%

Critical (9.2). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.2 critical

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
CWE: CWE-284
Published: 2026-09-11
Modified: 2026-09-18
Record from: the NVD, synced 2026-10-19

References

https://www.cloudfoundry.org/blog/cve-2026-47839-federated-oidc-users-can-bypass-externalgroupswhitelist-to-gain-uaa-admin/

Check your stack JSON