cvedb.io
CVE-2026-4634
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2026-04-02T13:16:27.027 · Last modified 2026-06-30T03:20:35.377

Summary

A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with an excessively long scope parameter to the OpenID Connect (OIDC) token endpoint. This leads to high resource consumption and prolonged processing times, ultimately resulting in a Denial of Service (DoS) for the Keycloak server.

Affected products

redhat — build_of_keycloak

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.