CVE-2026-44345

BentoML: Dockerfile command injection via docker.base_image

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.

Affected

bentoml · BentoML

CVSS v3.1 GITHUB

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.48% chance of exploitation in the next 30 days, 40th percentile

Published

2026-05-27

Proof-of-concept exploits (1)

• advisories/GHSA-78f9-r8mh-4xm2

Security advisories

• bentoml/BentoML/security/advisories/GHSA-78f9-r8mh-4xm2

References

• CVE Record
• NVD entry