Server-Side Request Forgery (SSRF) in Keycloak - CVE-2026-4874
Published: September 5, 2026
Vulnerability identifier: #VU146985
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-4874
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform server-side request forgery.
The vulnerability exists due to improper control of outbound requests in the OIDC token endpoint when manipulating token endpoint configuration. A remote attacker can manipulate the OIDC token endpoint to perform server-side request forgery.
Affected software
Keycloak
Red Hat build of Keycloak
Red Hat build of Keycloak
How to mitigate CVE-2026-4874
Install security update from vendor's website.
Keycloak - update to 26.6.3
Red Hat build of Keycloak - addressed in versions 26.4.13, 26.6.3
Red Hat build of Keycloak - addressed in versions 26.4.13, 26.6.3