Is CVE-2026-64608 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-64608?

CVE-2026-64608 has a CVSS v3 severity of CRITICAL (9.8).

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CVE-2026-64608

Description

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.