Home/CVE/MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due
CVE

CVE-2026-33866

MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due

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.

MEDIUM · CVSS 4.3 EPSS 9e-05
Schedule remediation
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-862Missing Authorization
▤

Affected Products & Versions

1
lfprojects mlflow<= 3.10.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI mlflow MODERATE
⚠

Public Exploits & PoCs

1
pocafine.com · attacking-mlflow-how-ml-artifacts-become-attack-vectorsafine.com
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · cvd@cert.pl
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Apr 2026 · 01:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert.pl/en/posts/2026/04/CVE-2026-33865/Third Party Advisory
https://github.com/mlflow/mlflow/pull/21708Issue TrackingPatch
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