Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M

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

High 7.8

In plain English

A high-severity OS command injection in BentoML from bentoml. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.3%top 74.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	bentoml	1.4.38	GHSA-fgv4-6jr3-jgfw
PyPI	bentoml	1.4.38	PYSEC-2026-158

Affected products (as reported)

Vendor	Product	Versions
bentoml	BentoML	< 1.4.38

Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://github.com/bentoml/BentoML/security/advisories/GHSA-fgv4-6jr3-jgfw x_refsource_CONFIRM