PT-2026-53501 · Pypi · Mlflow

Published 2026-06-29 · Updated 2026-06-29

OSV

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

Fix

Related Identifiers

PYSEC-2026-419

Affected Products

Mlflow

References · 6

• https://osv.dev/vulnerability/PYSEC-2026-419 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0545 · Security Note
• https://github.com/mlflow/mlflow · Note
• https://github.com/advisories/GHSA-7qhf-v65m-g5f3 · Note
• https://huntr.com/bounties/b2e5b028-9541-4d29-8703-a76f1a3734d8 · Note
• https://pypi.org/project/mlflow · Note