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5.8 Medium

CVE-2026-4366 A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP…

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.

Affected products and versions

Product Affected versions Fixed in
Red Hat build of Keycloak 26.4 26.4 earliest → < 26.4-17 26.4-17
Red Hat build of Keycloak 26.4.12 Versions not published
Red Hat Build of Keycloak Versions not published
Red Hat JBoss Enterprise Application Platform 8 Versions not published
Red Hat JBoss Enterprise Application Platform Expansion Pack Versions not published
Red Hat Single Sign-On 7 Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat build of Keycloak 26.4

The 87 CVEs of Red Hat build of Keycloak 26.4 →
CVE-2026-19607 A flaw was found in the first-broker-login flow of the keycloak-services component 5.3 Medium CVE-2026-17526 Keycloak is an open-source identity and access management solution 7.2 High CVE-2026-79651 A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service… 7.5 High CVE-2026-74909 Keycloak provides a policy enforcer to protect applications by matching incoming web requests against defined security… 8.1 High
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