CVE-2026-35044: Bentoml

Critical severity, CVSS 9.6. EPSS: 0.5% 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. Prior to 1.4.38, the Dockerfile generation function generate_containerfile() in src/bentoml/_internal/container/generate.py uses an unsandboxed jinja2.Environment with the jinja2.ext.do extension to render user-provided dockerfile_template files. When a victim imports a malicious bento archive and runs bentoml containerize, attacker-controlled Jinja2 template code executes arbitrary Python directly on the host machine, bypassing all container isolation. This vulnerability is fixed in 1.4.38.

Affected products

• Bentoml Bentoml: before 1.4.38 (fixed in 1.4.38)

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