A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited, an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values. The issue is fixed in Keycloak 24 with the introduction of the User Profile feature.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-6841
• https://access.redhat.com/security/cve/CVE-2023-6841
• https://bugzilla.redhat.com/show_bug.cgi?id=2254714
• keycloak/keycloak#32837
• https://github.com/keycloak/keycloak/releases/tag/24.0.0