CVE-2026-2635

Summary

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.

Affected Software

Weaknesses

• CWE-1393: CWE-1393: Use of Default Password

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

mlflow: MLflow Use of Default Password Authentication Bypass Vulnerability

Additional References

• https://access.redhat.com/security/cve/CVE-2026-2635
• https://bugzilla.redhat.com/show_bug.cgi?id=2441514
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2635.json

References

• https://www.zerodayinitiative.com/advisories/ZDI-26-111/
• https://github.com/mlflow/mlflow/pull/19260

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