CVE-2026-4634
Keycloak: Application-Level DoS via Scope Processing
7.5
HIGH
CVSS 3.1
EPSS 0.52%
描述
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.
如何修補 CVE-2026-4634
要修補 CVE-2026-4634,請將受影響套件升級到下列已修補版本。
- —升級至 26.5.7 或更新版本
CVE-2026-4634 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 26.5.7
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |