CVE-2026-64849
MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. 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.
CVSS Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Affected Products (1)
| Vendor | Product | Version |
|---|---|---|
| lfprojects | mlflow | * < 3.15.0 |
GitHub Security Advisory GHSA-7gwp-5pfp-969j
MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
References (6)
- https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 Patch
- https://github.com/mlflow/mlflow/issues/24179 Exploit, Issue Tracking, Mitigation
- https://github.com/mlflow/mlflow/pull/24258 Issue Tracking, Patch
- https://github.com/mlflow/mlflow/releases/tag/v3.15.0 Release Notes
- https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j Exploit, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849 US Government Resource
Risk Scores
Top 5% most likely to be exploited
CISA Known Exploited
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.