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CVE-2026-64849

MLflow Server-Side Request Forgery Vulnerability

MLflow MLflow CWE-918

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 Score
9.3
Critical
EPSS — Exploit Probability
10%
Riskier than 95% of all CVEs · checked 2026-10-01
Exploitation
Confirmed in the wild
KEV since 2026-08-19
Remediation
Patch available
Federal deadline 2026-09-02
CISA required action

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. Deadline for federal agencies: 2026-09-02.

NVD entry Vendor patch PoC / advisory CISA KEV

5 articles across 5 outlets · first covered Aug 18, 2026 · latest Aug 20, 2026

Coverage timeline