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.

INFO

Published Date :

2026-03-26T07:12:37.545Z

Last Modified :

2026-04-01T14:24:14.569Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2026-4874 vulnerability.

Vendors Products
Redhat
  • Build Keycloak
  • Build Of Keycloak
  • Jboss Enterprise Application Platform
  • Jboss Enterprise Application Platform Expansion Pack
  • Jbosseapxp
  • Red Hat Single Sign On
  • Single Sign-on
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4874.

URL Resource
https://access.redhat.com/security/cve/CVE-2026-4874 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2451611 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-4874 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-4874 cve-icon
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CVSS Vulnerability Scoring System

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