---
id: CVE-2024-9070
aliases:
  - GHSA-9g44-gwvm-hc44
  - PYSEC-2026-295
title: BentoML deserialization vulnerability
summary: BentoML deserialization vulnerability
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: bentoml
product: bentoml
ecosystem: pip
affected:
  - bentoml <= 1.4.5
published: '2025-03-20'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T15:30:04.318306060Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-9g44-gwvm-hc44'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-9070'
  - url: 'https://github.com/bentoml/BentoML'
  - url: >-
      https://github.com/bentoml/BentoML/blob/a6f5f937be6ec278f3d4f3bbc6f3c8f9564820d7/src/bentoml/_internal/server/runner_app.py#L297
  - url: >-
      https://github.com/bentoml/BentoML/blob/v1.4.5/src/bentoml/_internal/server/runner_app.py#L301
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/bentoml/PYSEC-2026-295.yaml
  - url: 'https://huntr.com/bounties/7be6fc22-be18-44ee-a001-ac7158d5e1a5'
  - url: 'https://pypi.org/project/bentoml'
  - url: 'https://github.com/advisories/GHSA-9g44-gwvm-hc44'
tags:
  - osv
  - pip
  - ghsa
epss: 0.00931
epssPercentile: 0.6046
cwe:
  - CWE-502
ingestedAt: '2026-10-27T16:11:58.731Z'
---

## Overview

A deserialization vulnerability exists in BentoML's runner server in bentoml/bentoml versions <=1.3.4.post1. By setting specific parameters, an attacker can execute unauthorized arbitrary code on the server, causing severe harm. The vulnerability is triggered when the args-number parameter is greater than 1, leading to automatic deserialization and arbitrary code execution.

## Affected packages

- `bentoml <= 1.4.5`

## Remediation

Refer to the advisory for the patched release.