CVE-2026-64609: Out-of-bounds read via sun.misc.Unsafe in Apache Fory
This Apache advisory covers CVE-2026-64609 in Apache Fory and Apache Fury.
- CVE-2026-64609
Key facts
- Vendor rating
- Critical, CVSS 9.1
- CISA KEV
- Not listed (catalogue checked )
- Affected
- 0.5.0 through 1.4.0.
- Fixed in
- 1.4.0, 0.11.0
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
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.
Text from the source record.
- 0.5.0 through 1.4.0.
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-64609
Upgrade to a fixed release named by Apache:
- 1.4.0
- 0.11.0
Vendor guidance
- Users are recommended to upgrade to version 1.4.0, which fixes the issue.
More Apache Software Foundation advisories
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Apache Software Foundation advisories, July 2026All Apache Software Foundation advisories
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