CVE-2026-2635
MLflow Use of Default Password Authentication Bypass Vulnerability
HIGH 7.3
At a glance
- Source
- NVD
- EPSS
- EPSS 1.08 % · percentile 65 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- zdi
- NVD status
- Deferred
Description
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.
Weaknesses (CWE)
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | CRITICAL 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | zdi |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | redhat-SADP |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
| CVSS 3.0 | CRITICAL 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · zdi-disclosures@trendmicro.com (Secondary) |
Advisories
- GHSA-gq3w-7jj3-x7gr — MLflow Use of Default Password Authentication Bypass Vulnerability
- PYSEC-2026-421 — MLflow Use of Default Password Authentication Bypass Vulnerability
European references
- ENISA EUVD · EUVD-2026-7766
- GCVE · GCVE-0-2026-2635
Affected products
| Product | Versions |
|---|---|
| MLflow · MLflow | affected 3.4.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |