CVE-2026-64849

Known Exploited Vulnerability

MLflow Server-Side Request Forgery Vulnerability

Vendor / product: MLflow / MLflow

Description

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.

Weakness classification

• security-advisories@github.com: CWE-918

Primary references

• security-advisories@github.com — Patch
• security-advisories@github.com — Exploit, Issue Tracking, Mitigation
• security-advisories@github.com — Issue Tracking, Patch
• security-advisories@github.com — Release Notes
• security-advisories@github.com — Exploit, Vendor Advisory
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource