CVE-2026-4874
Keycloak Server-Side Request Forgery via OIDC token endpoint manipulation
3.1
LOW
CVSS 3.1
EPSS 0.29%
描述
A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery (SSRF) by manipulating the `client_session_host` parameter during refresh token requests. This occurs when a Keycloak client is configured to use the `backchannel.logout.url` with the `application.session.host` placeholder. Successful exploitation allows the attacker to make HTTP requests from the Keycloak server’s network context, potentially probing internal networks or internal APIs, leading to information disclosure.
如何修補 CVE-2026-4874
要修補 CVE-2026-4874,請將受影響套件升級到下列已修補版本。
- —升級至 26.6.3 或更新版本
CVE-2026-4874 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 26.5.0, < 26.6.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |