CVE-2026-24123 BentoML has a Path Traversal via Bentofile Configuration
Attackers can craft malicious Bentofile configurations to exfiltrate sensitive files into AI model archives, enabling supply chain attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-24123?
CVE-2026-24123 is a high-severity path traversal vulnerability in BentoML, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-24123?
3 open source packages ship an affected version, including bentoml. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
bentoml PyPI | All versions | 1.4.34 |
bentoml PyPI | All versions | 1.4.34 |
bentoml PyPI | All versions | 1.4.34 |
Products include Bentoml Bentoml.
How do I fix CVE-2026-24123?
Upgrade bentoml to 1.4.34 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-24123 being exploited?
There is no known exploitation of CVE-2026-24123 in the wild and no public exploit code.
Other vulnerabilities in BentoML
- CVE-2025-54381 BentoML is Vulnerable to an SSRF Attack Through File Upload Processing
- CVE-2025-32375 Insecure Deserialization leads to RCE in BentoML's runner server
- CVE-2025-27520 BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization
- CVE-2026-44345 BentoML: Dockerfile command injection via docker.base_image
- CVE-2026-44346 BentoML: Dockerfile command injection via envs[*].name in bentofile.yaml
Sources
Also known as GHSA-6r62-w2q3-48hf, PYSEC-2026-1218.