CVE-2026-64608

Heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compatible mode, the field-skip paths do not correctly validate the declared field types against the actual data, so input with an inconsistent schema can cause type confusion and out-of-bounds memory access. Only the C++ implementation is affected; other language implementations of Apache Fory are not. This issue affects Apache Fory C++: from 0.14.0 before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - security@apache.org

Published

2026-07-21

Last modified

2026-10-24

Weaknesses

CWE-502, CWE-787, CWE-843

Affected products

• Fory (Apache)
• Apache Fory (Apache Software Foundation)

References

• https://lists.apache.org/thread/wl05slf57zzoq1s4pg4tk6nx6mjyjr4b
• http://www.openwall.com/lists/oss-security/2026/07/21/5