CVE-2026-4282
Published:April 02, 2026
Updated:April 20, 2026
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
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.2.0 <26.2.15Fix Suggestion:
Update to version 26.2.15https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.5.0 <26.5.7Fix Suggestion:
Update to version 26.5.7https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.4.0 <26.4.11Fix Suggestion:
Update to version 26.4.11org.keycloak:keycloak-services (JAVA):
Affected version(s) >=26.5.0 <26.5.7Fix Suggestion:
Update to version 26.5.7org.keycloak:keycloak-services (JAVA):
Affected version(s) >=1.0-alpha-1 <26.5.7Fix Suggestion:
Update to version 26.5.7Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Isolation or Compartmentalization
EPSS
Base Score:
0.04
