Keycloak: Mehrere Schwachstellen
WID-SEC-2026-1612 · first 20.05.2026 · updated 20.05.2026 · CVSS 8,1
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, Daten zu manipulieren, Sicherheitsvorkehrungen zu umgehen und einen Denial of Service zu verursachen.
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
- Daten zu manipulieren
- Sicherheitsvorkehrungen zu umgehen
- einen Denial of Service zu verursachen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- Open Source Keycloak <26.6.2
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Keycloak 26.6.2
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)
- Keycloak 26.6.2 release vom 2026-05-19 www.keycloak.org
- Red Hat Security Advisory RHSA-2026:19594 vom 2026-05-20 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19597 vom 2026-05-20 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19596 vom 2026-05-20 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19595 vom 2026-05-20 access.redhat.com
CVE: CVE-2026-37978, CVE-2026-37979, CVE-2026-37981, CVE-2026-37982, CVE-2026-4630, CVE-2026-7307, CVE-2026-7504, CVE-2026-7507, CVE-2026-7571
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.