CVE-2026-3009
Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator
8.1
HIGH
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2026-3009
To remediate CVE-2026-3009, upgrade the affected package to a fixed version below.
- —upgrade to 26.5.5 or later
Is CVE-2026-3009 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 26.5.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |