CVE-2026-0545: Missing Authentication for Critical Function in mlflow/mlflow
In mlflow/mlflow, the FastAPI job endpoints under `/ajax-api/3.0/jobs/*` are not protected by authentication or authorization when the `basic-auth` app is enabled. This vulnerability affects the latest version of the repository. If job execution is enabled (`MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true`) and any job function is allowlisted, any network client can submit, read, search, and cancel jobs without credentials, bypassing basic-auth entirely. This can lead to unauthenticated remote code execution if allowed jobs perform privileged actions such as shell execution or filesystem changes. Even if jobs are deemed safe, this still constitutes an authentication bypass, potentially resulting in job spam, denial of service (DoS), or data exposure in job results.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-0545?
CVE-2026-0545 is classified as a critical vulnerability due to missing authentication for critical functions.
How do I fix CVE-2026-0545?
To fix CVE-2026-0545, ensure that authentication and authorization are properly implemented for FastAPI job endpoints in mlflow.
Which software versions are affected by CVE-2026-0545?
CVE-2026-0545 affects all versions of mlflow up to and including version 3.10.1.
What are the potential risks of CVE-2026-0545?
The risks associated with CVE-2026-0545 include unauthorized access to critical job endpoints, leading to potential data breaches or manipulation.
Is there a patch available for CVE-2026-0545?
Yes, a patch for CVE-2026-0545 is included in the latest updates of mlflow that address the missing authentication issue.