CVE-2026-47839
Received Received - Intake

Authentication Bypass via OIDC Group Mapping in VMware

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: VMware

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.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-47839
EUVD
EUVD-2026-76026

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
vmware uaa *
cloud_foundry uaa to 77.30.0 (inc)
cloud_foundry cf_deployment to 48.9.0 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability allows users authenticating via a federated OIDC provider to obtain the uaa.admin scope even when operators restrict that provider using externalGroupsWhitelist. It specifically occurs when an OIDC identity provider uses groupMappingMode set to AS_SCOPES with a wildcard entry in externalGroupsWhitelist.

Detection Guidance

Check UAA configuration for OIDC providers with groupMappingMode set to AS_SCOPES and wildcard entries in externalGroupsWhitelist. Review logs for unauthorized uaa.admin scope assignments.

Impact Analysis

An attacker could exploit this to gain administrative privileges in the UAA system, potentially allowing unauthorized access to sensitive data, system control, or further network compromise. This could impact confidentiality, integrity, and availability of the system.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements such as GDPR's data protection principles or HIPAA's security and privacy rules. It may result in regulatory penalties, loss of trust, and legal consequences.

Mitigation Strategies

Upgrade UAA to v77.31.0 or later and cf-deployment to v48.10.0 or later. Remove wildcard entries in externalGroupsWhitelist and avoid using groupMappingMode: AS_SCOPES.

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