Detections
Analytics

MLflow < 3.15.0 SSRF (CVE-2026-64849)

critical Nessus Plugin ID 338765

Synopsis

The remote host is affected by a server-side request forgery vulnerability.

Description

The version of MLflow installed on the remote host is prior to 3.15.0. It is, therefore, affected by a server-side request forgery vulnerability:

 - The unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls
 _validate_webhook_url() only for the original URL while the webhook delivery follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. (CVE-2026-64849)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to MLflow version 3.15.0 or later.

See Also

https://github.com/advisories/GHSA-7gwp-5pfp-969j

Plugin Details

Severity: Critical

ID: 338765

File Name: mlflow_CVE-2026-64849.nasl

Version: 1.1

Type: Combined

Published: 8/21/2026

Updated: 8/21/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.2

Percentile: 99.7

CVSS v2

Risk Factor: High

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-64849

CVSS v3

Risk Factor: Critical

Base Score: 9.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Vulnerability Information

CPE: cpe:/a:lfprojects:mlflow

Required KB Items: installed_sw/MLflow

Patch Publication Date: 8/2/2026

Vulnerability Publication Date: 8/2/2026

CISA Known Exploited Vulnerability Due Dates: 9/9/2026

Reference Information

CVE: CVE-2026-64849

CWE: 918