How severe is CVE-2026-35044?

CVE-2026-35044 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-35044 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35044?

CVE-2026-35044 affects Bentoml. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35044?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-35044 have an EU (EUVD) identifier?

Yes. CVE-2026-35044 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19386.

When was CVE-2026-35044 published?

CVE-2026-35044 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-35044

CVE-2026-35044 is a high-severity vulnerability in Bentoml with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1336.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19386
Weakness: CWE-1336
Affected product: Bentoml
Published: 2026-04-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-35044?: 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.
How severe is CVE-2026-35044?: CVE-2026-35044 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-35044 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35044?: CVE-2026-35044 affects Bentoml. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35044?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-35044 have an EU (EUVD) identifier?: Yes. CVE-2026-35044 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19386.
When was CVE-2026-35044 published?: CVE-2026-35044 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/bentoml/BentoML/security/advisories/GHSA-v959-cwq9-7hr6

Affected products (1)

cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:*

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