CVE-2026-4366 MEDIUM

CVE-2026-4366: Keycloak-services: blind server-side request forgery (ssrf) via http redirect handling in keycloak

Vendor Red Hat
Product Red Hat build of Keycloak 26.4.12
Weakness CWE-918 · SSRF
Published March 18, 2026
Last update June 9, 2026

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources. As a result, sensitive internal services such as cloud metadata endpoints could be accessed. This issue may lead to information disclosure and enable attackers to map internal network infrastructure.

Key dates

02Disclosure timeline

March 18, 2026 CVE published
June 9, 2026 Record updated

Related vulnerabilities

04Related CVE