# CVE-2026-3009

## Summary

- **CVE ID:** CVE-2026-3009
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-285, CWE-863
- **Published:** Mar 5, 2026
- **Last Modified:** Sep 14, 2026

## 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

- Red Hat — Red Hat build of Keycloak 26.4 (26.4.10-1)
- Red Hat — Red Hat build of Keycloak 26.4 (26.4-12)

## References

- [CNA](https://access.redhat.com/errata/RHSA-2026:3947)
- [CNA](https://access.redhat.com/errata/RHSA-2026:3948)
- [CNA](https://access.redhat.com/security/cve/CVE-2026-3009)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2441867)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3009.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 26.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._