CVE-2026-1180

Description

A flaw was identified in Keycloaks 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.

Risk Information

Base Score

5.8

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.044

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2026-1180 are affected in Keycloak - keycloak-adapter-core 25.0.3	Windows
Vulnerabilities CVE-2026-1180 are affected in Keycloak - keycloak-adapter-core for Linux 25.0.3	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234