Keycloakb (CIBA): Schwachstelle ermöglicht Manipulation von Dateien
WID-SEC-2026-0288 · first 03.02.2026 · updated 03.02.2026 · CVSS 2,7
What it is about
Keycloak ermöglicht Single Sign-On mit Identity and Access Management für moderne Anwendungen und Dienste. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Server-Side Request Forgery (SSRF) durchzuführen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- Server-Side Request Forgery (SSRF) durchzuführen
Am I affected?
Affected according to the BSI:
- Open Source Keycloak <=26.5.2
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
CVE: CVE-2026-1518
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.