CVE-2026-2614 Arbitrary File Read via Prompt Tag Source Validation Bypass in mlflow/mlflow
Unauthenticated attackers can read arbitrary files from the MLflow server by bypassing source path validation in model version creation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-2614?
CVE-2026-2614 is a high-severity path traversal vulnerability in Lfprojects Mlflow, published on 11 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the `_create_model_version()` handler of `mlflow/server/handlers.py` in mlflow/mlflow versions 3.9.0 and earlier allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem. The issue arises when a `CreateModelVersion` request includes the tag `mlflow.prompt.is_prompt`, which bypasses source path validation. This enables an attacker to store an arbitrary local filesystem path as the model version source. The `get_model_version_artifact_handler()` function later uses this source to serve files without verifying the model version's prompt status, leading to a complete confidentiality compromise. This issue is fixed in version 3.10.0.
Weakness: CWE-22
Which versions are affected by CVE-2026-2614?
4 open source packages ship an affected version, including mlflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mlflow Bitnami | All versions | 3.10.0 |
mlflow PyPI | All versions | 3.10.0 |
mlflow PyPI | All versions | 3.10.0 |
mlflow PyPI | All versions | 3.10.0 |
Products include Lfprojects Mlflow.
How do I fix CVE-2026-2614?
Upgrade mlflow to 3.10.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-2614 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2614 exists.
Public exploit code: 1 Nuclei template.
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-2026-2614, GHSA-42h5-h8qh-vv9v, PYSEC-2026-2654.