CVE-2026-2393 Server-Side Request Forgery (SSRF) in mlflow/mlflow
An authenticated attacker can exploit an SSRF vulnerability in MLflow to access internal services and steal cloud credentials by sending requests to arbitrary URLs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-2393?
CVE-2026-2393 is a high-severity server-side request forgery vulnerability in Lfprojects Mlflow, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A Server-Side Request Forgery (SSRF) vulnerability exists in MLflow versions prior to 3.9.0. The `_create_webhook()` function in `mlflow/server/handlers.py` accepts a user-controlled `url` parameter without validation, and the `_send_webhook_request()` function in `mlflow/webhooks/delivery.py` sends HTTP POST requests to this attacker-controlled URL. This allows an authenticated attacker to force the MLflow backend to send HTTP requests to internal services, cloud metadata endpoints, or arbitrary external servers. The lack of input sanitization, URL scheme filtering, or allowlist validation on the webhook URL enables exploitation, potentially leading to cloud credential theft, internal network access, and data exfiltration.
Weakness: CWE-918
Which versions are affected by CVE-2026-2393?
4 open source packages ship an affected version, including mlflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mlflow Bitnami | All versions | 3.9.0 |
mlflow PyPI | All versions | 3.9.0 |
mlflow PyPI | All versions | 3.9.0 |
mlflow PyPI | All versions | 3.9.0 |
Products include Lfprojects Mlflow.
How do I fix CVE-2026-2393?
Upgrade mlflow to 3.9.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-2393 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2393 exists.
Other vulnerabilities in Lfprojects Mlflow
- CVE-2026-64849 MLflow Server-Side Request Forgery
- CVE-2025-15379 Command Injection in mlflow/mlflow
- CVE-2024-0520 Remote Code Execution due to Full Controlled File Write in mlflow/mlflow
- CVE-2023-6977 Path Traversal: '\..\filename'
- CVE-2023-6709 Improper Neutralization of Special Elements Used in a Template Engine in mlflow/mlflow
Sources
Also known as BIT-mlflow-2026-2393, GHSA-65h7-c7c4-mghx, PYSEC-2026-2219.