CVE-2026-64609

Critical

Description

Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserialization is used, readAlignedVarUint() can read beyond the bounds of the underlying buffer. Out-of-band zero-copy deserialization is an opt-in feature; applications that do not use it are not affected. This issue affects Apache Fory (formerly Apache Fury): from 0.5.0 before 1.4.0. Versions before 0.11.0 were published under the Maven coordinates org.apache.fury:fury-core. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Apache Fory

PublishedJul 21, 2026

First seenJul 21, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

apache fory1.4.0 or later

Vendor advisories

lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b

Affected products

Product	Affected versions	Fixed in
apache fory	0.5.0 ≤ v < 1.4.0	1.4.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.