CVE-2026-47839
CriticalCVSS 9.2Summary
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.
Risk Assessment
An attacker can gain administrative privileges (uaa.admin), leading to full system control and privilege escalation. This is a serious breach of access controls in a federated environment.
Recommendation
Update to a version containing the fix and review the externalGroupsWhitelist and groupMappingMode configuration for OIDC providers. Avoid using wildcard entries in group whitelists.
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Original NVD description (English source)
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.