What is CVE-2026-2635?

CVE-2026-2635 is a high-severity vulnerability in Mlflow, classified under CWE-1393. CVSS score: 7.3/10. Published 2026-02-20.

How severe is CVE-2026-2635?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Mlflow

CVE-2026-2635

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.

EPSS: 0.010 (58.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Mlflow — versions 3.4.0

Weakness classification (CWE)

References

zdi-disclosures@trendmicro.com (x_research-advisory)
zdi-disclosures@trendmicro.com (vendor-advisory)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Frequently asked questions

What is CVE-2026-2635?: CVE-2026-2635 is a high-severity vulnerability in Mlflow, classified under CWE-1393. CVSS score: 7.3/10. Published 2026-02-20.
How severe is CVE-2026-2635?: High severity. CVSS v3 base score is 7.3 out of 10.