---
cve: "CVE-2026-64849"
severity: "CRITICAL"
cvss: 9.3
epss: "16.4%"
vendor: "mlflow"
kev: true
exploited: true
published: "2026-08-17 22:17:23"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T09:17:54+02:00"
---

# CVE-2026-64849

> 9.3 CRITICAL · ⚠️ CISA KEV (29 Tage) · 🔓 Exploited · 🧪 PoC

## Beschreibung

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. This issue is fixed in version 3.15.0.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/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 | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- d0f31520ec4af7c4deaa9a8e7904c442fb1b310d (Commit)
- ba949522477cbd5915aa55d29b0cfad7d5ddf939 (Commit)

## Referenzen

- <https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j>
- <https://github.com/mlflow/mlflow/issues/24179>
- <https://github.com/mlflow/mlflow/pull/24258>
- <https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939>
- <https://github.com/mlflow/mlflow/releases/tag/v3.15.0>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64849) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_