Medium 5.3Published Apr 7, 2026

CVE-2026-33866Authorization Bypass in MLflow AJAX Endpoint

Updated under an hour ago (Oct 27, 2026, 2:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Mlflow

Exploited in the last 30 days

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: 5.3 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: CERT-PL
NVD analysis: Analyzed
Record last updated: Apr 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mlflow Mlflow mlflow:mlflow (from the name)	through 3.10.1	CNA record
lfprojects mlflow lfprojects:mlflow	through 3.10.1	NVD

References

References

https://github.com/mlflow/mlflow/pull/21708	patch, issue-tracking
https://cert.pl/en/posts/2026/04/CVE-2026-33865/	third-party-advisory
https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors	exploit, technical-description, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.