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Vulnerability record · CVE-2026-3009 · published 5 March 2026

CVE-2026-3009: Redhat build of keycloak incorrect authorization vulnerability

Redhat · Build Of Keycloak

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.

8.1 CVSS 3.1 High EPSS 0.47% · top 61.9% CWE-863 · Incorrect authorization
8.1CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
9References
14 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:3947 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3948 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-3009 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2441867 Issue TrackingVendor Advisory
https://access.redhat.com/errata/RHSA-2026:3947 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3948 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-3009 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2441867 Issue TrackingVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3009.json

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-3009), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.