Vulnerability Description
A Server-Side Request Forgery (SSRF) vulnerability exists in MLflow versions prior to 3.9.0. The `_create_webhook()` function in `mlflow/server/handlers.py` accepts a user-controlled `url` parameter without validation, and the `_send_webhook_request()` function in `mlflow/webhooks/delivery.py` sends HTTP POST requests to this attacker-controlled URL. This allows an authenticated attacker to force the MLflow backend to send HTTP requests to internal services, cloud metadata endpoints, or arbitrary external servers. The lack of input sanitization, URL scheme filtering, or allowlist validation on the webhook URL enables exploitation, potentially leading to cloud credential theft, internal network access, and data exfiltration.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/mlflow/mlflow/commit/64aa0ab7207f9c649b59ba1a5f40d82196817389
- https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150
- https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150
FAQ
What is CVE-2026-2393?
CVE-2026-2393 is a vulnerability with a CVSS score of 7.1 (HIGH). A Server-Side Request Forgery (SSRF) vulnerability exists in MLflow versions prior to 3.9.0. The `_create_webhook()` function in `mlflow/server/handlers.py` accepts a user-controlled `url` parameter w...
How severe is CVE-2026-2393?
CVE-2026-2393 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2393?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.