CVE-2026-4634
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Przepełnienie bufora w Keycloak prowadzi do odmowy usługi przez wysokie zużycie zasobów.
CVSS
7.5
EPSS
0.7%
Exploit
none
Vendor
redhat
Opis źródłowy (NVD)
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.
dos
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 7.5 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 0.7% |
| Opublikowano (NVD) | 2026-04-02 13:16:27 UTC |
| Ostatnia modyfikacja (NVD) | 2026-10-06 00:16:35 UTC |
Referencje
- https://access.redhat.com/errata/RHSA-2026:6475 ([email protected]) [Vendor Advisory]
- https://access.redhat.com/errata/RHSA-2026:6476 ([email protected]) [Vendor Advisory]
- https://access.redhat.com/errata/RHSA-2026:6477 ([email protected]) [Vendor Advisory]
- https://access.redhat.com/errata/RHSA-2026:6478 ([email protected]) [Vendor Advisory]
- https://access.redhat.com/errata/RHSA-2026:76132 ([email protected])
- https://access.redhat.com/errata/RHSA-2026:76134 ([email protected])
- https://access.redhat.com/security/cve/CVE-2026-4634 ([email protected]) [Vendor Advisory]
- https://bugzilla.redhat.com/show_bug.cgi?id=2450250 ([email protected]) [Issue Tracking, Vendor Advisory]
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4634.json (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)