Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-4282US | — | Exploit | ||
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacke… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2026:6475WEB
- https://access.redhat.com/errata/RHSA-2026:6476WEB
- https://access.redhat.com/errata/RHSA-2026:6477WEB
- https://access.redhat.com/errata/RHSA-2026:6478WEB
- https://access.redhat.com/security/cve/CVE-2026-4282WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2448061WEB
- https://github.com/keycloak/keycloakPACKAGE
- https://github.com/keycloak/keycloak/commit/9046f201125a6fd6be9c116b99d348509d99d4a5WEB
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