VULNERABILITY INTELLIGENCE

CVE-2026-4874

CVSS score3.1 LOW
EPSS probability0.35%
CISA KEVNot currently listed
Published2026-03-26
Last modified2026-06-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

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.

Weakness classification

  • secalert@redhat.com: CWE-918

Primary references