GHSA-46r5-x6jq-v8g6
MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint
At a glance
- Published
- Updated
- CVE
- CVE-2026-33866
- Aliases
- BIT-mlflow-2026-33866, PYSEC-2026-94
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
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
Affected packages
| Package | Versions |
|---|---|
| PyPI · mlflow | introduced 0, fixed 3.11.0rc0 |
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
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |