CVE-2026-4366

MEDIUM

5.8

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.

CVE Details

CVSS v3.1 Score5.8

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/18/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

redhat:build_of_keycloakredhat:jboss_enterprise_application_platformredhat:jboss_enterprise_application_platform_expansion_packredhat:single_sign-on

Weaknesses (CWE)

CWE-918

References

https://access.redhat.com/security/cve/CVE-2026-4366(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2448543(secalert@redhat.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.