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CVE-2026-41486— Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization

Quick assessment

Affected
ray-project ray
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ray是ray-project开源的一个用于扩展 AI 和 Python 应用程序的统一框架。 Ray 2.54.0版本至2.55.0之前版本存在代码注入漏洞，该漏洞源于全局注册自定义Arrow扩展类型时，PyArrow读取Parquet文件调用__arrow_ext_deserialize__，可能导致在模式解析期间执行任意代码。

AI Predicted 9.8 Difficulty: Easy EPSS 0.70% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
ray-project ray >= 2.54.0, < 2.55.0 affected
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I. Basic Information for CVE-2026-41486

Vulnerability Information
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Vulnerability Title
Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
Ray is an AI compute engine. From version 2.54.0 to before version 2.55.0, Ray Data registers custom Arrow extension types (ray.data.arrow_tensor, ray.data.arrow_tensor_v2, ray.data.arrow_variable_shaped_tensor) globally in PyArrow. When PyArrow reads a Parquet file containing one of these extension types, it calls __arrow_ext_deserialize__ on the field's metadata bytes. Ray's implementation passes these bytes directly to cloudpickle.loads(), achieving arbitrary code execution during schema parsing, before any row data is read. This issue has been patched in version 2.55.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Ray 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ray是ray-project开源的一个用于扩展 AI 和 Python 应用程序的统一框架。 Ray 2.54.0版本至2.55.0之前版本存在代码注入漏洞，该漏洞源于全局注册自定义Arrow扩展类型时，PyArrow读取Parquet文件调用__arrow_ext_deserialize__，可能导致在模式解析期间执行任意代码。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ray-project ray >= 2.54.0, < 2.55.0 -

II. Public POCs for CVE-2026-41486

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III. Intelligence Information for CVE-2026-41486

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Patches & Fixes for CVE-2026-41486 (2)

Vendor Advisories for CVE-2026-41486 (1)

Other References for CVE-2026-41486 (1)

IV. Related Vulnerabilities

Same product: ray
Same vendor: ray-project
Same weakness: CWE-94

V. Comments for CVE-2026-41486

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