CVE-2026-47839

Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin

State: Published
Severity: 9.2 Critical
Published: Sep 11, 2026
Updated: Sep 11, 2026
Reserved: May 20, 2026

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.

Scores

CVSS	Score	Vector	Source
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	vmware

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
UAACloud Foundry Foundation	77.30.0 and earlierAffected 77.31.0Not affected
cf-deploymentCloud Foundry Foundation	48.9.0 and earlierAffected 48.10.0Not affected

References

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

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