---
id: CVE-2026-33865
title: >-
  MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe
  parsing of YAML-based MLmodel artifacts in its web interface
summary: >-
  MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe
  parsing of YAML-based MLmodel artifacts in its web interface. An authenticated
  attacker can upload a malicious MLmodel file containing a payload that
  executes whe…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: lfprojects
product: mlflow
affected:
  - mlflow <= 3.10.1
published: '2026-04-07'
updated: '2026-06-17'
sourceUpdated: '2026-06-17T10:38:13.553'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33865'
references:
  - url: >-
      https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
    label: cvd@cert.pl
  - url: 'https://cert.pl/en/posts/2026/04/CVE-2026-33865/'
    label: cvd@cert.pl
  - url: 'https://github.com/mlflow/mlflow/pull/21435'
    label: cvd@cert.pl
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-04-14T15:13:51.359371Z'
scores:
  nvd: 5.4
  cna: 5.1
ingestedAt: '2026-09-14T00:02:47.843Z'
epss: 0.00218
epssPercentile: 0.12533
---

## Overview

MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. 

This issue affects MLflow version through 3.10.1

## Affected

- `mlflow <= 3.10.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.