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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 5
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.2.15:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:text-only:*:*:*
|
— | — |
|
Redhat Build_Of_Keycloak
cpe:2.3:a:redhat:build_of_keycloak:26.4.11:*:*:*:text-only:*:*:*
|
— | — |
References 6
https://access.redhat.com/errata/RHSA-2026:6475
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6476
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6477
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:6478
secalert@redhat.com
https://access.redhat.com/security/cve/CVE-2026-4282
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2448061
secalert@redhat.com