PT-2026-39663 · Bentoml+1 · Bentoml

Ssjcorpsec · Published 2026-05-11 · Updated 2026-05-27 · CVE-2026-44345

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions BentoML versions prior to 1.4.39

Description BentoML is a Python library used for building online serving systems optimized for AI applications and model inference. The issue occurs because the template src/bentoml/ internal/container/frontend/dockerfile/templates/base v2.j2 interpolates the docker.base image variable without escaping, newline filtering, or validation. A malicious bento.yaml file containing a multi-line value for docker.base image can smuggle arbitrary Dockerfile directives into the generated Dockerfile. When the bentoml containerize command is executed, it triggers a docker build that runs the injected RUN directives on the host system.

Recommendations Update to version 1.4.39.

Exploit

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-44345

GHSA-78F9-R8MH-4XM2

Affected Products

Bentoml

References · 6

• 🔥 https://github.com/bentoml/BentoML/security/advisories/GHSA-78f9-r8mh-4xm2 · Exploit
• https://osv.dev/vulnerability/GHSA-78f9-r8mh-4xm2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-44345 · Security Note
• https://github.com/bentoml/BentoML/security/advisories/GHSA-w2pm-x38x-jp44 · Note
• https://github.com/bentoml/BentoML · Note
• https://twitter.com/CVEnew/status/2059718121758576938 · Twitter Post