CVE-2026-35044 — BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation
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_container…
Published: 2026-04-06 · CVSS: 8.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7