high8.8
CVE-2026-35044
BentoML is a Python library for building online serving systems optimized for AI apps and model inference.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | bentoml | <= 1.4.37 | 1.4.38 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Bentoml | Bentoml | before 1.4.38 |