Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin
Priority MEDIUM 41CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284.
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 OIDC identity provider uses groupMappingMode: AS_SCOPES with a wildcard externalGroupsWhitelist entry.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Fixed UAA (Cloud Foundry Foundation): 77.31.0cf-deployment (Cloud Foundry Foundation): 48.10.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cloud Foundry Foundation | UAA | up to 77.30.0 | 77.31.0 | Patch available | CNA |
| Cloud Foundry Foundation | cf-deployment | up to 48.9.0 | 48.10.0 | Patch available | CNA |
- UAA VendorCloud Foundry Foundation Affected up to 77.30.0 Fixed in 77.31.0 Patch available CNA
- cf-deployment VendorCloud Foundry Foundation Affected up to 48.9.0 Fixed in 48.10.0 Patch available CNA
Remediation
- Fix · CNA UAA (Cloud Foundry Foundation) Fixed in 77.31.0
- Fix · CNA cf-deployment (Cloud Foundry Foundation) Fixed in 48.10.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-47839
- 2026-10-03 Alias added: GHSA-9wp3-mffv-5vr4
References
More Cloud Foundry Foundation vulnerabilities
- TI-2026-29616 Information disclosure in Cloud Foundry Foundation uaa_release CVSS 4.0CRITICAL 10.0
- TI-2026-29615 Improper authentication in Cloud Foundry Foundation log-cache_release CVSS 3.1HIGH 7.5
- TI-2026-35283 Incorrect Permission Assignment Allows Local Privilege Escalation to SYSTEM via Executable Overwrite CVSS 4.0HIGH 8.5
- TI-2026-35280 CVE-2026-47827 – BOSH CLI Powershell Injection CVSS 3.1HIGH 7.5
- TI-2026-29662 OS command injection in Cloud Foundry Foundation BOSH CVSS 4.0HIGH 8.7
- TI-2026-29661 OS command injection in Cloud Foundry Foundation BOSH Director CVSS 4.0HIGH 8.7
Sources
- CVE-2026-47839 · CVE Program
- CVE-2026-47839 · NVD
- FIRST EPSS
- GHSA-9wp3-mffv-5vr4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences