---
id: CVE-2026-47839
title: >-
  A vulnerability allows users authenticating through a federated OIDC provider
  to obtain the uaa.admin scope despite operators restricting that provider
  through externalGroupsWhitelist configuration
summary: >-
  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 …
severity: critical
cvss: 9.2
cvssVector: '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'
cwe:
  - CWE-284
vendor: Cloud Foundry Foundation
product: UAA
affected:
  - UAA <= 77.30.0
  - cf-deployment <= 48.9.0
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:21:34.307'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47839'
references:
  - url: >-
      https://www.cloudfoundry.org/blog/cve-2026-47839-federated-oidc-users-can-bypass-externalgroupswhitelist-to-gain-uaa-admin/
    label: security@vmware.com
tags:
  - nvd
  - cve.org
epss: 0.00314
epssPercentile: 0.21669
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-11T12:59:13.491445Z'
cvssSource: cna
ingestedAt: '2026-09-11T18:53:56.566Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.