Description
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
Affected products
redhat: build of keycloak; redhat: jboss enterprise application platform; redhat: jboss enterprise application platform expansion pack; redhat: single sign-on
References9
- access.redhat.com/errata/RHSA-2026:3947 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:3948 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-3009 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2441867 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:3947 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:3948 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-3009 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2441867 Issue TrackingVendor Advisory
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3009.…
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 12 November 2026
- CWE
- CWE-863
Could this be exploited in your environment?
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