CVE-2026-1180

MEDIUM EPSS 28.2%

Published Jan 20, 20265mo ago · Modified Jun 17, 20261w ago

5.8 CVSS 3.1

Medium

Published Jan 20, 2026 5mo ago

Last Modified Jun 17, 2026 1w ago

Description

A flaw was identified in Keycloak’s OpenID Connect Dynamic Client Registration feature when clients authenticate using private_key_jwt. The issue allows a client to specify an arbitrary jwks_uri, which Keycloak then retrieves without validating the destination. This enables attackers to coerce the Keycloak server into making HTTP requests to internal or restricted network resources. As a result, attackers can probe internal services and cloud metadata endpoints, creating an information disclosure and reconnaissance risk.

CVSS Details

Base Score

5.8

Exploitability

3.9

Impact

1.4

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

28.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

References 4

access.redhat.com https://access.redhat.com/errata/RHSA-2026:6477
access.redhat.com https://access.redhat.com/errata/RHSA-2026:6478
access.redhat.com https://access.redhat.com/security/cve/CVE-2026-1180
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2430781

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.