CVE-2026-33866
MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint
4.3
MEDIUM
CVSS 3.1
EPSS 0.01%
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
How to fix CVE-2026-33866
To remediate CVE-2026-33866, upgrade the affected package to a fixed version below.
- —upgrade to 3.11.1 or later
- —no fix listed
- —upgrade to 3.11.0rc0 or later
Is CVE-2026-33866 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 3.11.1
- from 0, <= 3.10.1
- from 0, < 3.11.0rc0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |