---
id: CVE-2026-64849
title: >-
  MLflow is an open source AI engineering platform for agents, large language
  models, and machine learning models
summary: >-
  MLflow is an open source AI engineering platform for agents, large language
  models, and machine learning models. Starting in 3.3.0 and prior to 3.15.0,
  the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls
  _validate_…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-918
vendor: lfprojects
product: mlflow
affected:
  - 'mlflow >= 3.3.0, < 3.15.0'
patched:
  - mlflow 3.15.0
published: '2026-08-17'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T13:35:35.850'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64849'
references:
  - url: >-
      https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939
    label: security-advisories@github.com
  - url: 'https://github.com/mlflow/mlflow/issues/24179'
    label: security-advisories@github.com
  - url: 'https://github.com/mlflow/mlflow/pull/24258'
    label: security-advisories@github.com
  - url: 'https://github.com/mlflow/mlflow/releases/tag/v3.15.0'
    label: security-advisories@github.com
  - url: 'https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j'
    label: security-advisories@github.com
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64849'
  - url: 'https://github.com/advisories/GHSA-7gwp-5pfp-969j'
  - url: 'https://github.com/mlflow/mlflow'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-3687.yaml
  - url: 'https://pypi.org/project/mlflow'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64849.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64849'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2517655'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64849'
  - url: 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog'
  - url: 'https://access.redhat.com/errata/RHSA-2026:60520'
  - url: 'https://access.redhat.com/errata/RHSA-2026:60367'
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
  - ghsa
  - pip
  - cve.org
  - csaf
  - vex
  - red-hat
  - osv
epss: 0.10017
epssPercentile: 0.95589
kev: true
kevDateAdded: '2026-08-19'
kevDueDate: '2026-09-02'
kevRansomware: false
exploited: true
exploits:
  github: 5
  githubRepos:
    - 'https://github.com/codeb0ssx/CVE-2026-64849-PoC'
    - 'https://github.com/BiuTrap/CVE-2026-64849'
    - 'https://github.com/zavisco/CVE-2026-64849.yaml'
  nuclei:
    - CVE-2026-64849
  checkedAt: '2026-10-27T19:07:31.089Z'
exploitAvailable: true
aliases:
  - GHSA-7gwp-5pfp-969j
  - BIT-mlflow-2026-64849
  - PYSEC-2026-3687
ecosystem: pip
ssvc:
  exploitation: active
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-20T03:55:29.820245Z'
scores:
  nvd: 9.3
  ghsa: 9.3
  cna: 9.3
  vendor: 8.5
  osv: 9.3
ingestedAt: '2026-08-17T22:01:16.670Z'
---

## Overview

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Starting in 3.3.0 and prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py 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. This issue is fixed in version 3.15.0.

## Affected

- `mlflow >= 3.3.0, < 3.15.0`

## Remediation

Upgrade past the affected range:

- `mlflow 3.15.0`

## Package advisory (CVE-2026-64849)

Affected packages:

- `mlflow >= 3.3.0, < 3.15.0`

Patched in:

- `mlflow 3.15.0`

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

## Vendor advisories

- **RHSA-2026:60520** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-08-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:60520)
- **RHSA-2026:60367** · Red Hat · fixed in: Red Hat OpenShift AI 3.5 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60367)