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 lead to the creation of admin-capable access tokens, resulting in privilege escalation.

Score

CVSS 3.1 7.4 High

Status

Modified - secalert@redhat.com

Published

2026-04-02

Last modified

2026-10-26

Weaknesses

CWE-653

Affected products

• Build Keycloak (Redhat)
• Build Of Keycloak (Redhat)

References

• https://access.redhat.com/errata/RHSA-2026:6475
• https://access.redhat.com/errata/RHSA-2026:6476
• https://access.redhat.com/errata/RHSA-2026:6477
• https://access.redhat.com/errata/RHSA-2026:6478
• https://access.redhat.com/security/cve/CVE-2026-4282
• https://bugzilla.redhat.com/show_bug.cgi?id=2448061
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4282.json