CVE-2026-2635 CRITICAL

CVE-2026-2635: MLflow Use of Default Password Authentication Bypass Vulnerability

Vendor Mlflow
Product MLflow
Weakness CWE-1393
Published February 20, 2026
Last update June 30, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

MLflow Use of Default Password Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the basic_auth.ini file. The file contains hard-coded default credentials. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of the administrator. Was ZDI-CAN-28256.

Key dates

02Disclosure timeline

February 20, 2026 CVE published
June 30, 2026 Record updated