CVE-2026-4366
MEDIUM EPSS 13.5%
Published Mar 18, 20263mo ago · Modified Jun 17, 20261w ago
5.8 CVSS 3.1
Published Mar 18, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Low
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
13.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-918 Server-Side Request Forgery (SSRF) Validation
Affected Products 4
References 4
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:19596
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:19597
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-4366
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2448543
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.