CVE-2026-3009A 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.
Updated under an hour ago ()
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It affects redhat build_of_keycloak and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat build_of_keycloak redhat:build_of_keycloak | all versions; 26.4; 26.4.10 | NVD |
redhat jboss_enterprise_application_platform redhat:jboss_enterprise_application_platform | 8.0 | NVD |
redhat jboss_enterprise_application_platform_expansion_pack redhat:jboss_enterprise_application_platform_expansion_pack | all versions | NVD |
redhat single_sign-on redhat:single_sign-on | 7.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:3947vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3948vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-3009vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2441867issue-tracking, vendor-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3009.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.