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CVE-2025-27520— BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization

Quick assessment

Affected
bentoml BentoML
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BentoML是BentoML开源的一个开源模型服务库。用于使用 Python 构建高性能和可扩展的人工智能应用程序。 BentoML 1.3.4版本至1.4.3之前版本存在代码问题漏洞，该漏洞源于不安全反序列化问题，可能导致远程代码执行。

CVSS 9.8 · Critical EPSS 40.62% · P99

Public Exploits 1

Metasploit · 1 bentoml_rce_cve_2025_27520.rb [exploit]
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I. Basic Information for CVE-2025-27520

Vulnerability Information
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Vulnerability Title
BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
BentoML is a Python library for building online serving systems optimized for AI apps and model inference. A Remote Code Execution (RCE) vulnerability caused by insecure deserialization has been identified in the latest version (v1.4.2) of BentoML. It allows any unauthenticated user to execute arbitrary code on the server. It exists an unsafe code segment in serde.py. This vulnerability is fixed in 1.4.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
BentoML 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BentoML是BentoML开源的一个开源模型服务库。用于使用 Python 构建高性能和可扩展的人工智能应用程序。 BentoML 1.3.4版本至1.4.3之前版本存在代码问题漏洞，该漏洞源于不安全反序列化问题，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
bentoml BentoML >= 1.3.4, < 1.4.3 -

II. Public POCs for CVE-2025-27520

# POC Description Source Link Shenlong Link
1 ay 09 — CVE-2025-27520 (BentoML-style insecure deserialization) — Local Docker lab https://github.com/amalpvatayam67/day09-bentoml-deser-lab POC Details
2 None https://github.com/Evillm/CVE-2025-27520-PoC POC Details
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Qwen3.6-35B-A3B · 7427 chars
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III. Intelligence Information for CVE-2025-27520

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IV. Related Vulnerabilities

Same product: BentoML
Same vendor: bentoml
Same weakness: CWE-502

V. Comments for CVE-2025-27520

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