Keycloak: Mehrere Schwachstellen
WID-SEC-2026-3727 · first 05.10.2026 · updated 05.10.2026 · CVSS 6,5
What it is about
Keycloak ermöglicht Single Sign-On mit Identity and Access Management für moderne Anwendungen und Dienste. Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Informationen offenzulegen und Sicherheitsmaßnahmen zu umgehen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- Informationen offenzulegen
- Sicherheitsmaßnahmen zu umgehen
Am I affected?
Affected according to the BSI:
- Open Source Keycloak
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
According to the BSI there is no update yet. The vendor notices below name interim protective measures, if any.
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Red Hat Bugtracker 2545797 vom 2026-10-04 bugzilla.redhat.com
- Red Hat Bugtracker 2545800 vom 2026-10-04 bugzilla.redhat.com
- Red Hat Bugtracker 2545802 vom 2026-10-04 bugzilla.redhat.com
- RedHat Customer Portal vom 2026-10-04 access.redhat.com
- RedHat Customer Portal vom 2026-10-04 access.redhat.com
- RedHat Customer Portal vom 2026-10-04 access.redhat.com
CVE: CVE-2026-105301, CVE-2026-105302, CVE-2026-105306
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.