Advisory Details

February 19th, 2026

MLflow Use of Default Password Authentication Bypass Vulnerability

CVE ID	CVE-2026-2635
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	MLflow
AFFECTED PRODUCTS	MLflow
VULNERABILITY DETAILS	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.
ADDITIONAL DETAILS	MLflow has issued an update to correct this vulnerability. More details can be found at: https://github.com/mlflow/mlflow/pull/19260
DISCLOSURE TIMELINE	2025-10-14 - Vulnerability reported to vendor 2026-02-19 - Coordinated public release of advisory 2026-02-19 - Advisory Updated
CREDIT	Peter Girnus (@gothburz) of Trend Zero Day Initiative

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