CVE-2026-2393
Server-Side Request Forgery (SSRF) in mlflow/mlflow
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.
INFO
Published Date :
May 11, 2026, 6:16 p.m.
Last Modified :
May 27, 2026, 7:05 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | HIGH | [email protected] | ||||
| CVSS 3.0 | HIGH | MITRE-CVE |
Solution
- Update MLflow to version 3.9.0 or later.
- Validate webhook URLs for allowed schemes.
- Filter URLs to prevent access to internal resources.
- Restrict access to metadata endpoints.
Public PoC/Exploit Available at Github
CVE-2026-2393 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2393.
| URL | Resource |
|---|---|
| https://github.com/mlflow/mlflow/commit/64aa0ab7207f9c649b59ba1a5f40d82196817389 | Patch |
| https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 | Exploit Third Party Advisory |
| https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2393 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2393
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
ZeroGraph - pentest agent for whitebox code review
Python Shell Dockerfile Makefile C C++ Scala
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2393 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2393 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* versions up to (excluding) 3.9.0 Added Reference Type huntr.dev: https://github.com/mlflow/mlflow/commit/64aa0ab7207f9c649b59ba1a5f40d82196817389 Types: Patch Added Reference Type CISA-ADP: https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 Types: Exploit, Third Party Advisory Added Reference Type huntr.dev: https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 11, 2026
Action Type Old Value New Value Added Reference https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 -
New CVE Received by [email protected]
May. 11, 2026
Action Type Old Value New Value Added 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. Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Added CWE CWE-918 Added Reference https://github.com/mlflow/mlflow/commit/64aa0ab7207f9c649b59ba1a5f40d82196817389 Added Reference https://huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150