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Description

MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due to missing access‑control validation, a user without permissions to a given experiment can directly query this endpoint and retrieve model artifacts they are not authorized to access. This issue affects MLflow version through 3.10.1

PUBLISHED Reserved 2026-03-24 | Published 2026-04-07 | Updated 2026-04-14 | Assigner CERT-PL




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-862 Missing Authorization

Product status

Default status
unaffected

Any version
affected

Credits

Sławomir Zakrzewski (AFINE) finder

References

github.com/mlflow/mlflow/pull/21708 patch

cert.pl/en/posts/2026/04/CVE-2026-33865/ third-party-advisory

afine.com/...g-mlflow-how-ml-artifacts-become-attack-vectors exploit technical-description

cve.org (CVE-2026-33866)

nvd.nist.gov (CVE-2026-33866)

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