CVE-2026-44346

BentoML: Dockerfile command injection via envs[*].name in bentofile.yaml

State: Published
Severity: 8.8 High
Published: May 27, 2026
Updated: May 28, 2026
Reserved: May 5, 2026

Description

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, a malicious bentofile.yaml containing a newline-injected value in envs[*].name produces unquoted RUN directives in the BentoML-generated Dockerfile. When the victim runs bentoml containerize on the imported bento, those RUN directives execute on the host during docker build. This vulnerability is fixed in 1.4.39.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
BentoMLbentoml	< 1.4.39Affected

References

https://github.com/bentoml/BentoML/security/advisories/GHSA-w2pm-x38x-jp44

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