RedHat Build of Keycloak: Mehrere Schwachstellen
WID-SEC-2026-2677 · first 06.08.2026 · updated 17.09.2026 · CVSS 8,8
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 Administratorrechte zu erlangen, Benutzerkonten zu übernehmen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand herbeizuführen.
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
- Administratorrechte zu erlangen
- Benutzerkonten zu übernehmen
- Sicherheitsmaßnahmen zu umgehen
- vertrauliche Informationen offenzulegen
- Daten zu manipulieren oder einen Denial-of-Service-Zustand herbeizuführen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- Open Source Keycloak Red Hat build of Keycloa <26.4.14-1
- Open Source Keycloak Red Hat build of Keycloa <26.6.5-1
- Open Source Keycloak Red Hat build of Keycloa <26.6-11
- Open Source Keycloak Red Hat build of Keycloa <26.4-22
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 Red Hat build of Keycloa 26.4.14-1
- Open Source Keycloak Red Hat build of Keycloa 26.6.5-1
- Open Source Keycloak Red Hat build of Keycloa 26.6-11
- Open Source Keycloak Red Hat build of Keycloa 26.4-22
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)
- GitHub Advisory Database vom 2026-08-05 github.com
- GitHub Advisory Database vom 2026-08-05 github.com
- GitHub Advisory Database vom 2026-08-05 github.com
- GitHub Advisory Database vom 2026-08-05 github.com
- GitHub Advisory Database vom 2026-08-05 github.com
- GitHub Advisory Database vom 2026-08-05 github.com
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 euvd.enisa.europa.eu
- EU Vulnerability Database vom 2026-08-05 github.com
- Red Hat Security Advisory RHSA-2026:68280 vom 2026-09-16 access.redhat.com
- Red Hat Security Advisory RHSA-2026:68278 vom 2026-09-16 access.redhat.com
- Red Hat Security Advisory RHSA-2026:68276 vom 2026-09-16 access.redhat.com
- Red Hat Security Advisory RHSA-2026:68277 vom 2026-09-16 access.redhat.com
CVE: CVE-2026-15572, CVE-2026-15573, CVE-2026-16071, CVE-2026-16100, CVE-2026-16102, CVE-2026-16442, CVE-2026-18967
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.