CVE-2026-3009

Name: CVE-2026-3009
Creator: NVD / NIST
Published: 2026-03-05T19:16:18.193+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2026-3009 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.33%

25.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	All versions
Redhat	Build Of Keycloak	26.4
Redhat	Build Of Keycloak	26.4.10
Redhat	Jboss Enterprise Application Platform	8.0
Redhat	Jboss Enterprise Application Platform Expansion Pack	All versions
Redhat	Single Sign-On	7.0

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

Timeline

Published: Mar 5, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-3009?

How severe is CVE-2026-3009?

CVE-2026-3009 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3009?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3009?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST