SSRF in Lfprojects Mlflow
CVE-2026-2393
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Lfprojects Mlflow
- Mlflow Mlflow/mlflow — versions unspecified
Weakness classification (CWE)
References
- huntr.com/bounties/04ef100d-06b5-4a70-95b1-b7be23aa8150 (Exploit, Third Party Advisory)
- github.com/mlflow/mlflow/commit/64aa0ab7207f9c649b59ba1a5f40d82196817389 (Patch)
Frequently asked questions
- What is CVE-2026-2393?
- CVE-2026-2393 is a high-severity vulnerability in Lfprojects Mlflow, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.1/10. Published 2026-05-11.
- How severe is CVE-2026-2393?
- High severity. CVSS v3 base score is 7.1 out of 10.