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GeekWala

CVE-2026-35044 — Vulnerability in bentoml — CVE Details

CRITICAL

Published April 6, 2026Updated May 20, 2026Source: osv

Summary

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.38, the Dockerfile generation function generate_containerfile() in src/bentoml/_internal/container/generate.py uses an unsandboxed jinja2.Environment with the jinja2.ext.do extension to render user-provided dockerfile_template files. When a victim imports a malicious bento archive and runs bentoml containerize, attacker-controlled Jinja2 template code executes arbitrary Python directly on the host machine, bypassing all container isolation. This vulnerability is fixed in 1.4.38.

Advisory Timeline

  • First published April 6, 2026 (189 days ago).
  • Last revised May 20, 2026 — 44 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update bentoml to 1.4.38 or later
pip install "bentoml>=1.4.38"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
bentoml
pypi
0.0.1, 0.0.2, 0.0.3, 0.0.5 (+213 more)1.4.38

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-35044?
This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.6/10).
How do I check if my project is affected by CVE-2026-35044?
CVE-2026-35044 affects bentoml. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-35044 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.6

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

PYSEC-2026-159
GHSA-v959-cwq9-7hr6

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