GitHub Advisoryadvisory · Maven

GHSA-7vw6-5q2f-7w5r Keycloak’s OpenID Connect Dynamic Client Registration feature affected by Server-Side Request Forgery (SSRF)

MEDIUM Published 2026-01-20 Modified 2026-04-02 Official page ↗
Aliases
CVE-2026-1180
Ecosystem
Maven
Packages
org.keycloak:keycloak-adapter-core
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Weaknesses
CWE-918
Reviewed
2026-01-21

Affected packages

• Maven org.keycloak:keycloak-adapter-core: <= 25.0.3 (no fix yet)

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.

Related

Alias · CVE (1)

  • CVE-2026-1180 A flaw was identified in Keycloak’s OpenID Connect Dynamic Client Registration feature when clients authenticate using private_key_jwt. vulnerability

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References