CVE-2026-4282
Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw
- State
- Published
- Severity
- 7.4 High
- Published
- Apr 2, 2026
- Updated
- Jul 15, 2026
- Reserved
- Mar 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat-SADP |
Weaknesses
- CWE-653 Improper Isolation or Compartmentalization
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Keycloak 26.2Red Hat |
|
Red Hat build of Keycloak 26.2Red Hat |
|
Red Hat build of Keycloak 26.2Red Hat |
|
Red Hat build of Keycloak 26.2.15Red Hat | |
Red Hat build of Keycloak 26.4Red Hat |
|
Red Hat build of Keycloak 26.4Red Hat |
|
Red Hat build of Keycloak 26.4Red Hat |
|
Red Hat build of Keycloak 26.4.11Red Hat |
References
- RHSA-2026:6475vendor-advisory
- RHSA-2026:6476vendor-advisory
- RHSA-2026:6477vendor-advisory
- RHSA-2026:6478vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-4282vdb-entry
- RHBZ#2448061issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4282.json
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