CVE-2026-4874

LOW

Org.keycloak.protocol.oidc.grants: org.keycloak.services.managers: keycloak: server-side request forgery via oidc token endpoint manipulation

Title source: cna

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.

References (2)

[Vdb Entry, X_Refsource_Redhat] https://access.redhat.com/security/cve/CVE-2026-4874

[Issue Tracking, X_Refsource_Redhat] https://bugzilla.redhat.com/show_bug.cgi?id=2451611

Scores

CVSS v3 3.1

EPSS 0.0002

EPSS Percentile 6.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Details

CWE

CWE-918

Status published

Products (9)

org.keycloak/keycloak-services 0Maven

Red Hat/Red Hat Build of Keycloak

Red Hat/Red Hat JBoss Enterprise Application Platform 8

Red Hat/Red Hat JBoss Enterprise Application Platform Expansion Pack

Red Hat/Red Hat Single Sign-On 7

redhat/build_of_keycloak

redhat/jboss_enterprise_application_platform 8.0.0

redhat/jboss_enterprise_application_platform_expansion_pack

redhat/single_sign-on 7.0

Published Mar 26, 2026

Tracked Since Mar 26, 2026