CVE-2026-109081
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).
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The sources do not list affected products or versions for this vulnerability yet.
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Published
First publication at the source
Last modified
Latest change at the source
Collected
First seen by Baba Yaga Security