CVE-2026-64609

criticalCVSS 9.1covered by 1 sourcefirst seen 2026-07-21

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.

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Exploitation outlook

Low exploitation risk0.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-64609: Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserializat…nvd · 2026-07-21

External references

NVD record for CVE-2026-64609

CVE.org record

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