high7.4
CVE-2026-4282
Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | < 26.5.7 | 26.5.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | All versions Versions 26.2, 26.2.15, 26.4, 26.4.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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
- https://github.com/advisories/GHSA-hj93-h7pg-fh6v
- https://nvd.nist.gov/vuln/detail/CVE-2026-4282
- https://github.com/keycloak/keycloak/issues/47719
- https://github.com/keycloak/keycloak/commit/9046f201125a6fd6be9c116b99d348509d99d4a5