Cyber Resilience

CVE-2026-44345

HighPublic PoCRCE

Published: 27 May 2026

Published
27 May 2026
Modified
02 June 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0032 23.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-44345 is a high-severity OS Command Injection (CWE-78) vulnerability in Bentoml Bentoml. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Python (T1059.006); ranked at the 23.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

This vulnerability is AI-related — categorised as NLP and Transformers; in the Supply Chain and Deployment risk domain.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles…

more

arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.

CWE(s)
CWE-78

AI Security AnalysisAI

AI Category
NLP and Transformers
Risk Domain
Supply Chain and Deployment
OWASP Top 10 for LLMs 2025
None mapped
Classification Reason
Matched keywords: ai, bentoml

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.006 Python Execution
Adversaries may abuse Python commands and scripts for execution.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

Template injection in Python library enables OS command execution (via injected Dockerfile RUN) on victim host during bentoml containerize, directly mapping to Python interpreter abuse and client-side exploitation.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-35043Same product: Bentoml Bentoml
CVE-2026-44346Same product: Bentoml Bentoml
CVE-2025-54381Same product: Bentoml Bentoml
CVE-2026-27905Same product: Bentoml Bentoml
CVE-2026-35044Same product: Bentoml Bentoml
CVE-2026-24123Same product: Bentoml Bentoml
CVE-2026-33744Same product: Bentoml Bentoml
CVE-2026-42215Shared CWE-78
CVE-2025-15063Shared CWE-78
CVE-2026-34940Shared CWE-78

Affected Assets

bentoml
bentoml
≤ 1.4.39

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References