CVE-2024-0520: Mlflow Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-5q6c-ffvg-xcm9
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CVSS 10.0
CWE-23 CWE-22
Published
Advisory Summary

CVE-2024-0520 is a CRITICAL (CVSS 10.0) remote code execution vulnerability (CWE-23: Relative Path Traversal) affecting Mlflow libraries in the PyPI ecosystem. The issue involves remote code execution in mlflow. Remediation is available by upgrading affected packages to version 2.9.0.

CVE-2024-0520 at a Glance

CVE Identifier CVE-2024-0520
GHSA Identifier GHSA-5q6c-ffvg-xcm9
Severity CRITICAL
CVSS v3.1 Base Score 10.0
CWE Classification CWE-23: Relative Path Traversal
Affected Product Mlflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 10.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2024-0520

To remediate this vulnerability, upgrade all affected Mlflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mlflow fixed: 2.9.0 
pip install mlflow>=2.9.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show mlflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2024-0520, inspect your installed packages using pip:

pip show mlflow

Analyze the terminal output to locate any version of Mlflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.9.0), your application is affected.

Note: The pip show mlflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-23: Relative Path Traversal, where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. In Mlflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability in mlflow/mlflow version 8.2.1 allows for remote code execution due to improper neutralization of special elements used in an OS command ('Command Injection') within the `mlflow.data.http_dataset_source.py` module. Specifically, when loading a dataset from a source URL with an HTTP scheme, the filename extracted from the `Content-Disposition` header or the URL path is used to generate the final file path without proper sanitization. This flaw enables an attacker to control the file path fully by utilizing path traversal or absolute path techniques, such as '../../tmp/poc.txt' or '/tmp/poc.txt', leading to arbitrary file write. Exploiting this vulnerability could allow a malicious user to execute commands on the vulnerable machine, potentially gaining access to data and model information. The issue is fixed in version 2.9.0.

CVE-2024-0520 Affected Mlflow Versions

1 component(s)
Fixed Versions:
2.9.0
Product / Package Ecosystem Affected Versions Fixed Version
mlflow
pypi/mlflow
PyPI
< 2.9.0
2.9.0

References

NVD — CVE-2024-0520 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-0520
Security Fix Commit FIX COMMIT
https://github.com/mlflow/mlflow/commit/400c226953b4568f4361bc0a0c223511652c2b9d
Mlflow Source Repository REPOSITORY
https://github.com/mlflow/mlflow
Mlflow Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2024-239.yaml
huntr.com/bounties/93e470d7-b... WEB
https://huntr.com/bounties/93e470d7-b6f0-409b-af63-49d3e2a26dbc

Frequently Asked Questions

What is CVE-2024-0520?
CVE-2024-0520 is a security vulnerability in Mlflow involving Remote code execution in mlflow under CWE-23: Relative Path Traversal.
Which Mlflow versions are affected?
Affected versions include releases prior to 2.9.0 across affected packages: mlflow.
What version fixes CVE-2024-0520?
Upgrading to 2.9.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mlflow affected?
Yes, mlflow is affected in releases prior to 2.9.0. Upgrade your dependency to 2.9.0 or later.
What is the CVSS score of CVE-2024-0520?
CVE-2024-0520 has a CVSS v3.1 base score of 10.0 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2024-0520?
CVE-2024-0520 is classified under CWE-23: Relative Path Traversal (The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.).
How can I check PyPI dependencies for CVE-2024-0520?
Run the dependency tree command: 'pip show mlflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5q6c-ffvg-xcm9",
  "modified" : "2025-04-08T22:00:47Z",
  "published" : "2024-06-06T21:30:35Z",
  "aliases" : [ "CVE-2024-0520" ],
  "summary" : "Remote code execution in mlflow",
  "details" : "A vulnerability in mlflow/mlflow version 8.2.1 allows for remote code execution due to improper neutralization of special elements used in an OS command ('Command Injection') within the `mlflow.data.http_dataset_source.py` module. Specifically, when loading a dataset from a source URL with an HTTP scheme, the filename extracted from the `Content-Disposition` header or the URL path is used to generate the final file path without proper sanitization. This flaw enables an attacker to control the file path fully by utilizing path traversal or absolute path techniques, such as '../../tmp/poc.txt' or '/tmp/poc.txt', leading to arbitrary file write. Exploiting this vulnerability could allow a malicious user to execute commands on the vulnerable machine, potentially gaining access to data and model information. The issue is fixed in version 2.9.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mlflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.9.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-0520"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow/commit/400c226953b4568f4361bc0a0c223511652c2b9d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mlflow/mlflow"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2024-239.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/93e470d7-b6f0-409b-af63-49d3e2a26dbc"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-23" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-06T22:15:31Z",
    "nvd_published_at" : "2024-06-06T19:15:51Z"
  }
}