---
cve: "CVE-2026-1180"
severity: "MEDIUM"
cvss: 5.8
epss: "38%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-01-20 13:16:03"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T22:31:23+02:00"
---

# CVE-2026-1180

> 5.8 MEDIUM

## Beschreibung

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-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-1180) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_