Vulnerability Details CVE-2026-4366
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.0%
CVSS Severity
CVSS v3 Score 5.8
References
Products affected by CVE-2026-4366
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cpe:2.3:a:redhat:build_of_keycloak:-
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cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0
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cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-
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cpe:2.3:a:redhat:single_sign-on:7.0