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CVE-2026-75935— Memory-amplification denial of service via declared-length preallocation in Amazon ion-java

Quick assessment

Affected
Amazon Ion Amazon Ion Java
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon Ion Java是Amazon Ion组织的一款Java语言的数据序列化格式实现。 Amazon Ion Java 1.12.0之前版本存在资源管理错误漏洞，该漏洞源于二进制Ion流游标中的不受控制的内存分配，特制Ion二进制文档包含声明长度字段导致过多堆预分配，可能允许远程攻击者造成拒绝服务。

CVSS 7.5 · High EPSS 0.44% · P37

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
Amazon Ion Amazon Ion Java 1.9.0< 1.12.0 affected
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I. Basic Information for CVE-2026-75935

Vulnerability Information
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Vulnerability Title
Memory-amplification denial of service via declared-length preallocation in Amazon ion-java
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation. To remediate this issue, users should upgrade to version 1.12.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Amazon Ion Java 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon Ion Java是Amazon Ion组织的一款Java语言的数据序列化格式实现。 Amazon Ion Java 1.12.0之前版本存在资源管理错误漏洞，该漏洞源于二进制Ion流游标中的不受控制的内存分配，特制Ion二进制文档包含声明长度字段导致过多堆预分配，可能允许远程攻击者造成拒绝服务。
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
Amazon Ion Amazon Ion Java 1.9.0 ~ 1.12.0 -

II. Public POCs for CVE-2026-75935

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9221 chars
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III. Intelligence Information for CVE-2026-75935

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Vendor Advisories for CVE-2026-75935 (2)

Vendor Pages for CVE-2026-75935 (1)

Other References for CVE-2026-75935 (1)

IV. Related Vulnerabilities

Same product: Amazon Ion Java
Same vendor: Amazon Ion
Same weakness: CWE-789

V. Comments for CVE-2026-75935

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