CVE-2026-33866
mediumpriority · track · 17OT risk · elevatedEPSS 0.004 · 30 %ileEUUSEPSS · scored 2026-10-27
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
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.3–5.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- GHSA-46r5-x6jq-v8g6MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint2026-04-07ghsa · osvUS
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
- BIT-mlflow-2026-33866Authorization Bypass in MLflow AJAX Endpoint2026-04-21vendor · osvUS
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
- PYSEC-2026-942026-04-07vendor · osvUS
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
also known as (7)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/cnnvd
- https://github.com/mlflow/mlflow/pull/21708cnnvd
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsenisa_euvd
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/enisa_euvd
- https://github.com/mlflow/mlflow/pull/21708enisa_euvd
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsExploitThird Party Advisorynvd
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/Third Party Advisorynvd
- https://github.com/mlflow/mlflow/pull/21708Issue TrackingPatchnvd
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