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EUVD-2026-280988

fkie_cve-2026-35043

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.38, the cloud deployment path in src/bentoml/_internal/cloud/deployment.py was not included in the fix for CVE-2026-33744. Line 1648 interpolates system_packages directly into a shell command using an f-string without any quoting. The generated script is uploaded to BentoCloud as setup.sh and executed on the cloud build infrastructure during deployment, making this a remote code execution on the CI/CD tier. This vulnerability is fixed in 1.4.38.

GHSA-fgv4-6jr3-jgfw — BentoML: Command Injection in cloud deployment setup script

Affected: PyPI: bentoml

Commit ce53491 (March 24) fixed command injection via `system_packages` in Dockerfile templates and `images.py` by adding `shlex.quote`. However, the cloud deployment path in `src/bentoml/_internal/cloud/deployment.py` was not included in the fix. Line 1648 interpolates `system_packages` directly into a shell command using an f-string without any quoting.

The generated script is uploaded to BentoCloud as `setup.sh` and executed on the cloud build infrastructure during deployment, making this a remote code execution on the CI/CD tier.

## Details

**Fixed paths (commit ce53491):** - `src/_bentoml_sdk/images.py:88` - added `shlex.quote(package)` - `src/bentoml/_internal/bento/build_config.py:505` - added `bash_quote` Jinja2 filter - Jinja2 templates: `base_debian.j2`, `base_alpine.j2`, etc.

**Unfixed path:**

`src/bentoml/_internal/cloud/deployment.py`, line 1648:

def _build_setup_script(bento_dir: str, image: Image | None) -> bytes: content = b"" config = BentoBuildConfig.from_bento_dir(bento_dir) if config.docker.system_packages: content += f"apt-get update && apt-get install -y {' '.join(config.docker.system_packages)} || exit 1\n".encode()

`system_packages` values from `bentofile.yaml` are joined with spaces and interpolated directly into the `apt-get install` command. No `shlex.quote`.

**Remote execution confirmed:** - Line 905: `setup_script = _build_setup_script(bento_dir, svc.image)` in `_init_deployment_files` - Line 908: `…

PYSEC-2026-158

Affected: PyPI: bentoml