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.
Advisories
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Fixes
Solution
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Workaround
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References
History
Mon, 11 May 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mlflow
Mlflow mlflow/mlflow |
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| Vendors & Products |
Mlflow
Mlflow mlflow/mlflow |
Mon, 11 May 2026 17:30:00 +0000
| Type | Values Removed | Values 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. | |
| Title | Server-Side Request Forgery (SSRF) in mlflow/mlflow | |
| Weaknesses | CWE-918 | |
| References |
| |
| Metrics |
cvssV3_0
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Projects
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Status: PUBLISHED
Assigner: @huntr_ai
Published:
Updated: 2026-05-11T16:30:04.201Z
Reserved: 2026-02-12T09:36:06.051Z
Link: CVE-2026-2393
No data.
Status : Received
Published: 2026-05-11T18:16:31.500
Modified: 2026-05-11T18:16:31.500
Link: CVE-2026-2393
No data.
OpenCVE Enrichment
Updated: 2026-05-11T18:30:05Z
Weaknesses