CVE-2026-71558: CWE-502 Deserialization of Untrusted Data in Apache Software Foundation Apache Fory
CVE-2026-71558 is a critical heap type confusion vulnerability in Apache Fory C++ polymorphic smart-pointer deserialization. Versions from 0.14.0 up to but not including 1.5.0 are affected. A crafted payload can bypass type compatibility checks, causing an incompatible object to be treated as a base type, potentially leading to denial of service or arbitrary code execution. The issue is fixed in Apache Fory 1.5.0. Applications not using this deserialization feature are not affected.
AI Analysis
Technical Summary
This vulnerability involves a heap type confusion in Apache Fory C++ deserialization of polymorphic smart pointers. Specifically, crafted input can bypass type compatibility checks, resulting in an object of an incompatible type being treated as the declared base type. This undefined behavior can lead to denial of service or arbitrary code execution. The affected versions are Apache Fory C++ 0.14.0 through versions before 1.5.0. The vendor has fixed the issue in version 1.5.0.
Potential Impact
Successful exploitation can lead to a complete compromise of the affected system, including arbitrary code execution, data corruption, or denial of service. The vulnerability allows an attacker to manipulate deserialization to cause type confusion, which is a serious security risk.
Mitigation Recommendations
Users should upgrade to Apache Fory version 1.5.0 or later, which contains the fix for this vulnerability. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected and do not require action. Patch status is not explicitly stated but upgrading to 1.5.0 is the recommended remediation.
CVE-2026-71558: CWE-502 Deserialization of Untrusted Data in Apache Software Foundation Apache Fory
Description
CVE-2026-71558 is a critical heap type confusion vulnerability in Apache Fory C++ polymorphic smart-pointer deserialization. Versions from 0.14.0 up to but not including 1.5.0 are affected. A crafted payload can bypass type compatibility checks, causing an incompatible object to be treated as a base type, potentially leading to denial of service or arbitrary code execution. The issue is fixed in Apache Fory 1.5.0. Applications not using this deserialization feature are not affected.
CVSS v3.1
Score 9.8critical
Affected software
Apache Software Foundation
Apache Fory
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap type confusion in Apache Fory C++ deserialization of polymorphic smart pointers. Specifically, crafted input can bypass type compatibility checks, resulting in an object of an incompatible type being treated as the declared base type. This undefined behavior can lead to denial of service or arbitrary code execution. The affected versions are Apache Fory C++ 0.14.0 through versions before 1.5.0. The vendor has fixed the issue in version 1.5.0.
Potential Impact
Successful exploitation can lead to a complete compromise of the affected system, including arbitrary code execution, data corruption, or denial of service. The vulnerability allows an attacker to manipulate deserialization to cause type confusion, which is a serious security risk.
Mitigation Recommendations
Users should upgrade to Apache Fory version 1.5.0 or later, which contains the fix for this vulnerability. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected and do not require action. Patch status is not explicitly stated but upgrading to 1.5.0 is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-07T07:01:06.753Z
- State
- PUBLISHED
Threat ID: 6a75a4d4bf8831d5391462e4
Added to database: 08/07/2026, 09:26:44 UTC
Last enriched: 08/14/2026, 16:01:03 UTC
Last updated: 09/21/2026, 22:01:37 UTC
Views: 120
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