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CVE-2026-71558— Apache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization

Quick assessment

Affected
Apache Software Foundation Apache Fory
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.

Apache Fory C++是美国Apache基金会的一个C++开发框架。 Apache Fory C++ 0.14.0版本至1.5.0之前版本存在反序列化注入漏洞，该漏洞源于多态智能指针反序列化过程中存在类型混淆，特制的输入有效载荷可绕过类型兼容性检查，导致不兼容类型的对象被当作声明的基类型处理，可能造成拒绝服务或任意代码执行。

AI Predicted 8.6 Difficulty: Moderate EPSS 0.99% · P62

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Fory 0.14.0< 1.5.0 affected
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I. Basic Information for CVE-2026-71558

Vulnerability Information
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Vulnerability Title
Apache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
Heap type confusion vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0. A crafted input payload can bypass type compatibility checks during polymorphic smart-pointer deserialization, causing an object of an incompatible type to be treated as the declared base type. This may result in undefined behavior and potentially lead to denial of service or arbitrary code execution. Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected.
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 C++ 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Fory C++是美国Apache基金会的一个C++开发框架。 Apache Fory C++ 0.14.0版本至1.5.0之前版本存在反序列化注入漏洞，该漏洞源于多态智能指针反序列化过程中存在类型混淆，特制的输入有效载荷可绕过类型兼容性检查，导致不兼容类型的对象被当作声明的基类型处理，可能造成拒绝服务或任意代码执行。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Fory 0.14.0 ~ 1.5.0 -

II. Public POCs for CVE-2026-71558

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III. Intelligence Information for CVE-2026-71558

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Mailing List Discussions for CVE-2026-71558 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-07 · 3 CVEs total

CVE-2026-71559 Apache Fory: Uncaught panic (remote DoS) in Go meta-string decoder from untrusted metadata
CVE-2026-71560 Apache Fory: Out-of-bounds heap read in C++ struct deserializer tagged-int fast-path

IV. Related Vulnerabilities

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