Open redirect in Keycloak - CVE-2026-7504
Published: September 10, 2026
Vulnerability identifier: #VU148947
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-7504
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to redirect users to unauthorized URLs.
The vulnerability exists due to improper URL validation in Keycloak\'s redirect URI validation logic when processing a malicious redirect URL containing multiple @ characters in the user-info component. A remote attacker can send a crafted redirect request to redirect users to unauthorized URLs.
User interaction is required, and only clients configured with a wildcard (*) in the Valid Redirect URIs field are affected.
Affected software
Keycloak
Red Hat build of Keycloak
Red Hat build of Keycloak
How to mitigate CVE-2026-7504
Install security update from vendor's website.
Keycloak - update to 26.6.2
Red Hat build of Keycloak - addressed in versions 26.2.16, 26.4.12
Red Hat build of Keycloak - addressed in versions 26.2.16, 26.4.12