CVE-2026-33866

Authorization Bypass in MLflow AJAX Endpoint

MEDIUM
4.3
CVSS Score
Published: April 7, 2026 at 12:57 PM UTC
Updated: June 17, 2026 at 10:38 AM UTC
2 products affected across 2 vendorsMlflowMLflow

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 3.10.1
v ≤ 3.10.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

PatchIssue Tracking
Source: cverecord
https://github.com/mlflow/mlflow/pull/21708
Third Party Advisory
Source: cverecord
https://cert.pl/en/posts/2026/04/CVE-2026-33865/
ExploitTechnical DescriptionThird Party Advisory
Source: cverecord
https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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