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CVE-2026-35044

Bentoml vulnerability

8.8 HIGHPublic exploitEPSS 0.48%
  1. Published6 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Bentoml< 1.4.38

Remediation

Fixed in
Bentoml≥ 1.4.38

References

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Frequently asked

Is CVE-2026-35044 being actively exploited?

CVE-2026-35044 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.48%.

How severe is CVE-2026-35044?

CVE-2026-35044 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2026-35044?

Affected products include Bentoml.

How do I fix CVE-2026-35044?

Upgrade affected software to a fixed version, for example Bentoml 1.4.38 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-35044 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.