GitHub Advisoryadvisory · PyPI
GHSA-46r5-x6jq-v8g6 MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint
MEDIUM
Official page ↗
- Aliases
- CVE-2026-33866
- Ecosystem
- PyPI
- Packages
- mlflow
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-862
- Reviewed
- 2026-04-08
Affected packages
• PyPI mlflow: < 3.11.0rc0 → fixed in 3.11.0rc0
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
Related
Alias · CVE (1)
- CVE-2026-33866 MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. vulnerability
Weakness · CWE (1)
- CWE-862 Missing Authorization weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-33866 advisory
- https://github.com/mlflow/mlflow/pull/21708 web
- https://github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a7 web
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors web
- https://cert.pl/en/posts/2026/04/CVE-2026-33865 web
- https://github.com/mlflow/mlflow package
- https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml web