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CVE-2026-75936— Memory-amplification denial of service via GZIP decompression bomb 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GZIP自动解压处理器对高度压缩数据处理不当，可能导致远程攻击者通过特制的压缩Ion文档（解压后扩展为任意大的大小）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 < 1.12.0 affected
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I. Basic Information for CVE-2026-75936

Vulnerability Information
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Vulnerability Title
Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java
Source: CVE Program / CVE List V5
Vulnerability Description
Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression. To remediate this issue, users should upgrade to version 1.12.0 and configure withGzipDecompressionEnabled(false) and/or set an explicit withMaximumBufferSize() when parsing untrusted input.
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
对高度压缩数据的处理不恰当(数据放大攻击)
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GZIP自动解压处理器对高度压缩数据处理不当，可能导致远程攻击者通过特制的压缩Ion文档（解压后扩展为任意大的大小）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 0 ~ 1.12.0 -

II. Public POCs for CVE-2026-75936

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10511 chars
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III. Intelligence Information for CVE-2026-75936

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Vendor Advisories for CVE-2026-75936 (2)

Other References for CVE-2026-75936 (1)

IV. Related Vulnerabilities

Same product: Amazon Ion Java
Same vendor: Amazon Ion
Same weakness: CWE-409

V. Comments for CVE-2026-75936

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