CVE-2026-109081 | BDVDB-2026-401077 Detail

Description#

A flaw was found in Keycloak. The Dynamic Client Registration (DCR) endpoint does not properly validate authorization when processing the deprecated defaultRoles field. An authenticated attacker with client creation privileges or an Initial Access Token (IAT) can inject excessive roles into the realm's default roles configuration. This causes clients across the realm to generate bloated access tokens, resulting in performance and memory degradation that can lead to a Denial of Service (DoS).

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-11-06Record published in the CVE List.
2. Version 22026-11-10Most recent update recorded in the CVE List.