Improper isolation or compartmentalization in Red Hat build of Keycloak - CVE-2026-4325
Published: September 11, 2026
Vulnerability identifier: #VU148976
CSH Severity: Medium
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-4325
CWE-ID: CWE-653
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to accounts.
The vulnerability exists due to improper type and namespace isolation in the SingleUseObjectProvider when handling single-use entries. A remote attacker can delete arbitrary single-use entries to replay consumed action tokens.
User interaction is required.
Affected software
Red Hat build of Keycloak
How to mitigate CVE-2026-4325
Install security update from vendor's website.
Red Hat build of Keycloak - addressed in versions 26.2.15, 26.4.11