CVE-2026-33865CWE-79

Stored XSS via unsafe YAML parsing in MLflow

Medium · published April 7, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
21.6
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00300 · 21.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-07T12:57Z
EPSS history
Timeline
  • 07 APR 12:57Z
    Stored XSS via unsafe YAML parsing in MLflow
    cvelistv5