CVE-2025-27520: Bentoml

Critical severity, CVSS 9.8. EPSS: 40.6% chance of exploitation in the next 30 days.

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. A Remote Code Execution (RCE) vulnerability caused by insecure deserialization has been identified in the latest version (v1.4.2) of BentoML. It allows any unauthenticated user to execute arbitrary code on the server. It exists an unsafe code segment in serde.py. This vulnerability is fixed in 1.4.3.

Affected products

• Bentoml Bentoml: from 1.3.4, up to and including 1.4.2

Published 2025-04-04. Last modified 2026-06-17.