What’s Vulnerable › Vulnerabilities

CVE-2026-64609: Apache Fory, Apache Fory: Out-of-Bounds Read via sun.misc.Unsafe in zero-copy java deserialization

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-21 · updated 2026-10-24
• Weakness: CWE-125

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.

Affected products

• Apache Software Foundation Apache Fory: from 0.5.0 before 1.4.0 — fixed in 1.4.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Fory 1.4.0. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b
• http://www.openwall.com/lists/oss-security/2026/07/21/6

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