CVE-2026-64608: Apache Fory

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Fory: from 0.14.0, before 1.4.0 (fixed in 1.4.0)

Published 2026-07-21. Last modified 2026-08-11.