7.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2026-35043

CVE-2026-35043: BentoML: command injection in cloud deployment setup script (deployment.py)

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.

(GitHub Advisory)

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CVE-2026-35043

CVE-2026-35043:

7.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

SSVC / BOD 26-04 ↗

Exploitation pocAutomatable NoTech Impact Total

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Package Name	Ecosystem	Vulnerable Versions	First Patched Version
bentoml	pip	<= 1.4.37	1.4.38

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability exists in the _build_setup_script function within src/bentoml/_internal/cloud/deployment.py. The provided description clearly pointed out that the system_packages value from a bentofile.yaml is used to construct a shell command without proper sanitization. This was confirmed by analyzing the patch that fixes the vulnerability. The fixing commit 79fbea5afd2b7065203eea8d807b50b661d70a0c was found by comparing the git tags for the last vulnerable version (v1.4.37) and the first patched version (v1.4.38). The commit shows that the vulnerable line, which used an f-string to directly embed the package names, was replaced by a version that uses shlex.quote to escape each package name. This prevents the command injection. The function _build_setup_script is the direct source of the vulnerability as it is responsible for creating the injectable command string.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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