High severity · published Feb 20, 2026
CVE-2026-2635
MLflow Use of Default Password Authentication Bypass Vulnerability
7.3
CVSS
1.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ML
MLflow · MLflow
3.4.0 · source: vendor
In the news
VulnerabilityCritical
ZDI-26-111: 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 ZDI has assigned a CVSS rating of 9.8. The following CVEs are assigned: CVE-2026-2635.
Feb 19, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2635
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2635
github.com
https://github.com/mlflow/mlflow/pull/19260
www.zerodayinitiative.com
https://www.zerodayinitiative.com/advisories/ZDI-26-111/
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-2635
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2441514
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2635.json
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No description published yet