CVE-2026-44346: BentoML is a Python library for building online serving systems optimized for AI apps and model inference

Q: How do I fix CVE-2026-44346?

bentoml: upgrade to 1.4.39. Exact commands for each OS are on this page.

Q: Is CVE-2026-44346 being exploited?

CVE-2026-44346 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44346 affect?

CVE-2026-44346 affects bentoml. Severity is high (CVSS 8.8). 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 t

Q: How urgent is CVE-2026-44346?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-44346 is a high-severity flaw (CVSS 8.8) affecting bentoml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-78, CWE-94
Published	2026-05-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: bentoml

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 18:16 UTCPublished CVE record published
2026-06-17 10:50 UTCUpdated Record last modified

bentoml bentoml UPGRADE

Affected: < 1.4.39

Fixed in: 1.4.39

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bentoml || rpm -q bentoml || bentoml --version

2. UPGRADE to 1.4.39 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bentoml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bentoml

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44346?

bentoml: upgrade to 1.4.39. Exact commands for each OS are on this page.

Is CVE-2026-44346 being exploited?

CVE-2026-44346 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44346 affect?

CVE-2026-44346 affects bentoml. Severity is high (CVSS 8.8). 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 t

How urgent is CVE-2026-44346?

Priority 42/100. High severity; Public exploit reference

Software pages

Python vulnerabilities · Docker vulnerabilities

Related CVEs

CVE-2026-35044 HIGH 8.8 UPGRADE BentoML is a Python library for building online serving systems optimized for AI apps and model inference
CVE-2026-35043 HIGH 7.8 UPGRADE BentoML is a Python library for building online serving systems optimized for AI apps and model inference
CVE-2026-40610 MEDIUM 5.5 UPGRADE BentoML is a Python library for building online serving systems optimized for AI apps and model inference
CVE-2026-44345 HIGH 8.8 UPGRADE BentoML is a Python library for building online serving systems optimized for AI apps and model inference

References

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