CVE-2026-33866

MEDIUM EPSS 28.1%
Published Apr 7, 20262mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Apr 7, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
28.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
lfprojectsmlflow* ≤3.10.1

References 3

  • afine.com https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
    ExploitThird Party Advisory
  • cert.pl https://cert.pl/en/posts/2026/04/CVE-2026-33865/
    Third Party Advisory
  • github.com https://github.com/mlflow/mlflow/pull/21708
    Issue TrackingPatch

Remediation

  • github.com https://github.com/mlflow/mlflow/pull/21708
    Issue TrackingPatch