CVE-2026-35044

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, Jinja2

Bentoml

< 1.4.38

Fix

Available

CVSS 3.1

9.6 CRITICAL

EPSS

0.4% (32th percentile)

Weakness

CWE-1336

NVD status

Analyzed

Published

2026-04-06

No exploit for CVE-2026-35044 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.