CVE-2026-2635CWE-1393

MLflow Use of Default Password Authentication Bypass Vulnerability

Critical · published February 20, 2026

CVSS v3.0
9.8
EPSS
1%
Percentile
71.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
9.8 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01358 · 71.5th percentile
Weakness
CWE-1393 · Use of Default Password
Published
2026-02-20T22:25Z
EPSS history
Timeline
  • 20 FEB 22:25Z
    MLflow Use of Default Password Authentication Bypass Vulnerability
    cvelistv5