Description
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.
Affected products
redhat: build of keycloak
References10
- access.redhat.com/errata/RHSA-2026:6475 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6476 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6477 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6478 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-4282 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2448061 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:6475 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6476 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6477 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6478 Vendor Advisory
Metrics
- CVSS 3.1
-
7.4
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS — exploit probability
- 0% percentile: 38 · as of 12 November 2026
- CWE
- CWE-653
Could this be exploited in your environment?
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