CVE-2026-47839CWE-284broken-access-control

CVE-2026-47839

published September 11, 2026

CVSS
9.2
EPSS
0%
Percentile
23.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.2 · NONE
CVSS v4.0
9.2 · 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
EPSS
0.00314 · 23.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-09-11T14:16Z
References (1)
https://www.cloudfoundry.org/blog/cve-2026-47839-federated-oidc-users-can-bypass-externalgroupswhitelist-to-gain-uaa-admin/ · [email protected]
EPSS history
Timeline
  • 12 SEP 03:21Z
    EPSS moved — → 0%
    epss
  • 11 SEP 09:14Z
    Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin
    cvelistv5