---
cve: "CVE-2026-16100"
severity: "MEDIUM"
cvss: 6.5
epss: "31%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-08-05 15:16:37"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T01:46:03+02:00"
---

# CVE-2026-16100

> 6.5 MEDIUM

## Beschreibung

A flaw was found in the user-event metrics recording of Keycloak. When metrics are enabled, the system records raw error messages from failed account operations as Prometheus metric labels. Because these error messages can include user-supplied input like nonexistent client IDs, an authenticated user can create a massive number of unique metric entries, eventually exhausting system memory and causing the service to crash or become unavailable.

## CVSS-Vektor

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

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

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:50848>
- <https://access.redhat.com/errata/RHSA-2026:50849>
- <https://access.redhat.com/security/cve/CVE-2026-16100>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2501730>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-16100) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_