Keycloak: keycloak: denial of service via excessive processing of openid connect scope parameters
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.
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beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2026-4634US | — | — | ||
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… | ||||
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Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://access.redhat.com/errata/RHSA-2026:6475ADVISORY
- https://access.redhat.com/errata/RHSA-2026:6476ADVISORY
- https://access.redhat.com/errata/RHSA-2026:6477ADVISORY
- https://access.redhat.com/errata/RHSA-2026:6478ADVISORY
- https://access.redhat.com/errata/RHSA-2026:76128WEB
- https://access.redhat.com/errata/RHSA-2026:76129WEB
- https://access.redhat.com/errata/RHSA-2026:76130WEB
- https://access.redhat.com/errata/RHSA-2026:76132WEB
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