BaseFortify

Publication date: 2026-01-26

Last updated on: 2026-02-03

Assigner: GitHub, Inc.

Description

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to version 1.4.34, BentoML's `bentofile.yaml` configuration allows path traversal attacks through multiple file path fields (`description`, `docker.setup_script`, `docker.dockerfile_template`, `conda.environment_yml`). An attacker can craft a malicious bentofile that, when built by a victim, exfiltrates arbitrary files from the filesystem into the bento archive. This enables supply chain attacks where sensitive files (SSH keys, credentials, environment variables) are silently embedded in bentos and exposed when pushed to registries or deployed. Version 1.4.34 contains a patch for the issue.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-26

Last Modified

2026-02-03

Generated

2026-07-06

AI Q&A

2026-01-27

EPSS Evaluated

2026-07-05

NVD

CVE-2026-24123

Affected Vendors & Products

Vendor	Product	Version / Range
bentoml	bentoml	to 1.4.34 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

This vulnerability in BentoML versions prior to 1.4.34 allows an attacker to perform path traversal attacks via multiple file path fields in the bentofile.yaml configuration. By crafting a malicious bentofile, an attacker can cause the build process to exfiltrate arbitrary files from the victim's filesystem into the bento archive. This means sensitive files like SSH keys, credentials, or environment variables can be silently embedded and exposed when the bentos are pushed to registries or deployed.

Impact Analysis

The vulnerability can lead to supply chain attacks where sensitive files from the victim's filesystem are exfiltrated and embedded into BentoML bentos without the victim's knowledge. This exposure of sensitive information such as SSH keys, credentials, and environment variables can compromise system security and lead to unauthorized access or data breaches when the bentos are pushed to registries or deployed.

Mitigation Strategies

Upgrade BentoML to version 1.4.34 or later, which contains a patch for the path traversal vulnerability in bentofile.yaml. Avoid building bentos from untrusted bentofile.yaml files to prevent supply chain attacks.

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