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CVE-2026-35044— BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation

Quick assessment

Affected
bentoml BentoML
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BentoML是BentoML开源的一个开源模型服务库。用于使用 Python 构建高性能和可扩展的人工智能应用程序。 BentoML 1.4.38之前版本存在安全漏洞，该漏洞源于Dockerfile生成函数使用未沙箱化的Jinja2环境渲染用户提供的模板，可能导致执行任意Python代码。

CVSS 8.8 · High EPSS 0.48% · P39
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I. Basic Information for CVE-2026-35044

Vulnerability Information
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Vulnerability Title
BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
BentoML 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BentoML是BentoML开源的一个开源模型服务库。用于使用 Python 构建高性能和可扩展的人工智能应用程序。 BentoML 1.4.38之前版本存在安全漏洞，该漏洞源于Dockerfile生成函数使用未沙箱化的Jinja2环境渲染用户提供的模板，可能导致执行任意Python代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
bentoml BentoML < 1.4.38 -

II. Public POCs for CVE-2026-35044

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III. Intelligence Information for CVE-2026-35044

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Vendor Advisories for CVE-2026-35044 (1)

IV. Related Vulnerabilities

Same product: BentoML
Same vendor: bentoml
Same weakness: CWE-1336

V. Comments for CVE-2026-35044

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