PatchTheCVECVE-2026-33866: MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artif
CVE-2026-33866 is a medium-severity flaw (CVSS 4.3) affecting mlflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-04-07 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-33866?
mlflow: upgrade to newer than 3.10.1. Exact commands for each OS are on this page.
Is CVE-2026-33866 being exploited?
CVE-2026-33866 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-33866 affect?
CVE-2026-33866 affects mlflow. Severity is medium (CVSS 4.3). 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
How urgent is CVE-2026-33866?
Priority 27/100. Public exploit reference
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