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.
History

Wed, 18 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 18 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Redhat jboss Enterprise Application Platform Expansion Pack
Vendors & Products Redhat build Of Keycloak
Redhat jboss Enterprise Application Platform Expansion Pack
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 18 Mar 2026 04:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Keycloak-services: blind server-side request forgery (ssrf) via http redirect handling in keycloak
First Time appeared Redhat
Redhat build Keycloak
Redhat jboss Enterprise Application Platform
Redhat jbosseapxp
Redhat red Hat Single Sign On
Weaknesses CWE-918
CPEs cpe:/a:redhat:build_keycloak:
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat build Keycloak
Redhat jboss Enterprise Application Platform
Redhat jbosseapxp
Redhat red Hat Single Sign On
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-03-18T17:58:48.644Z

Reserved: 2026-03-18T03:43:54.685Z

Link: CVE-2026-4366

cve-icon Vulnrichment

Updated: 2026-03-18T17:53:02.659Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-18T04:17:32.450

Modified: 2026-03-18T14:52:44.227

Link: CVE-2026-4366

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-03-18T00:00:00Z

Links: CVE-2026-4366 - Bugzilla