medium4.3
CVE-2026-33866
MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts.
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | mlflow | <= 3.10.1 | 3.11.0rc0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Lfprojects | Mlflow | through 3.10.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-46r5-x6jq-v8g6
- https://nvd.nist.gov/vuln/detail/CVE-2026-33866
- https://github.com/mlflow/mlflow/pull/21708
- https://cert.pl/en/posts/2026/04/CVE-2026-33865
- https://github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a7
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
- https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/