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CVE-2026-48207— Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement

Quick assessment

Affected
Apache Software Foundation Apache Fory
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.

Apache Fory是Apache基金会的一个序列化框架。 Apache Fory 1.0.0之前版本存在代码问题漏洞，该漏洞源于PyFory的ReduceSerializer在还原状态恢复和全局名称解析期间可能绕过DeserializationPolicy验证钩子，可能导致反序列化攻击者控制的数据时，应用程序依赖DeserializationPolicy限制不安全类、函数或模块属性时存在风险。

AI Predicted 9.8 Difficulty: Easy EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Fory 0.13.0< 1.0.0 affected
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I. Basic Information for CVE-2026-48207

Vulnerability Information
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Vulnerability Title
Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement
Source: CVE Program / CVE List V5
Vulnerability Description
Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data using PyFory Python-native mode with strict mode disabled and relies on DeserializationPolicy to restrict unsafe classes, functions, or module attributes. This issue affects Apache Fory: from before 1.0.0. Mitigation: Users of Apache Fory are recommended to upgrade to version 1.0.0 or later, which enforces DeserializationPolicy validation for the affected ReduceSerializer paths and thus fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
Apache Fory 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Fory是Apache基金会的一个序列化框架。 Apache Fory 1.0.0之前版本存在代码问题漏洞，该漏洞源于PyFory的ReduceSerializer在还原状态恢复和全局名称解析期间可能绕过DeserializationPolicy验证钩子，可能导致反序列化攻击者控制的数据时，应用程序依赖DeserializationPolicy限制不安全类、函数或模块属性时存在风险。
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
Apache Software Foundation Apache Fory 0.13.0 ~ 1.0.0 -

II. Public POCs for CVE-2026-48207

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 11624 chars
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III. Intelligence Information for CVE-2026-48207

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Vendor Advisories for CVE-2026-48207 (1)

IV. Related Vulnerabilities

Same product: Apache Fory
Same vendor: Apache Software Foundation
Same weakness: CWE-502

V. Comments for CVE-2026-48207

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