Vulnerability in Red Hat Build Of Keycloak 26.2

CVE-2026-4282

A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can…

EPSS: 0.000 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4282?
CVE-2026-4282 is a high-severity vulnerability in Red Hat Build Of Keycloak 26.2, classified under CWE-653. CVSS score: 7.4/10. Published 2026-04-02.
How severe is CVE-2026-4282?
High severity. CVSS v3 base score is 7.4 out of 10.