PYSEC-2026-421
MLflow Use of Default Password Authentication Bypass Vulnerability
At a glance
- Published
- Updated
- CVE
- CVE-2026-2635
- Aliases
- GHSA-gq3w-7jj3-x7gr
- CVSS_V3
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · mlflow | introduced 0, fixed 3.8.0rc0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-2635 ADVISORY
- https://github.com/mlflow/mlflow/pull/19260 WEB
- https://github.com/mlflow/mlflow/commit/5bf2ec2bd4222a18d78631183ac7f6b752afe8a4 WEB
- https://github.com/mlflow/mlflow PACKAGE
- https://github.com/mlflow/mlflow/releases/tag/v3.8.0rc0 WEB
- https://www.zerodayinitiative.com/advisories/ZDI-26-111 WEB
- https://pypi.org/project/mlflow PACKAGE
- https://github.com/advisories/GHSA-gq3w-7jj3-x7gr ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |