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The Hacker News AI Security · August 18, 2026

Attackers Exploit MLflow SSRF Flaw to Steal Cloud Credentials and Secrets

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Why it matters

CVE-2026-64849 is an unauthenticated SSRF flaw in MLflow model-registry webhooks that lets anyone reaching a vulnerable Tracking Server proxy requests to internal services and cloud metadata endpoints. The redirect handling bypasses earlier fixes, and honeypot telemetry showed indiscriminate scanning within hours of disclosure aimed at stealing cloud credentials and secrets. MLflow fixed the issue in 3.15.0.

My takeaway: Upgrade MLflow to 3.15.0 or later and remove Tracking Servers from public reach. Review webhook and network logs for metadata-service access, rotate every credential reachable from the affected workload, restrict instance metadata and egress, and require authentication and network policy around experiment infrastructure even when the upstream project assumes a trusted deployment boundary.
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