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

Quick assessment

Affected
Apache Software Foundation Apache Fory
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache fory是美国Apache基金会开源的一款Web应用框架。 Apache Fory 0.5.0版本至1.4.0之前版本存在缓冲区错误漏洞，该漏洞源于使用带外零拷贝反序列化时，readAlignedVarUint()函数中的越界读取问题，可能导致敏感信息泄露。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.78% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache Fory 0.11.0< 1.4.0 affected
0.5.0< 0.11.0 affected
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I. Basic Information for CVE-2026-64609

Vulnerability Information
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Vulnerability Title
Apache Fory, Apache Fory: Out-of-Bounds Read via sun.misc.Unsafe in zero-copy java deserialization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Fory 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache fory是美国Apache基金会开源的一款Web应用框架。 Apache Fory 0.5.0版本至1.4.0之前版本存在缓冲区错误漏洞，该漏洞源于使用带外零拷贝反序列化时，readAlignedVarUint()函数中的越界读取问题，可能导致敏感信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Fory 0.11.0 ~ 1.4.0 -
Apache Software Foundation Apache Fory 0.5.0 ~ 0.11.0 -

II. Public POCs for CVE-2026-64609

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III. Intelligence Information for CVE-2026-64609

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Mailing List Discussions for CVE-2026-64609 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-21 · 4 CVEs total

CVE-2026-60080 Apache Fory: Rust MetaString heap use-after-free
CVE-2026-64606 Apache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLam
CVE-2026-64608 Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field

IV. Related Vulnerabilities

Same product: Apache Fory
Same vendor: Apache Software Foundation
Same weakness: CWE-125

V. Comments for CVE-2026-64609

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