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.
Published: 2026-08-18
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

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Tracking

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Advisories

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History

Tue, 18 Aug 2026 20:00:00 +0000

Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Tue, 18 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
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.
Title Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java
First Time appeared Amazon Ion
Amazon Ion amazon Ion Java
Weaknesses CWE-409
CPEs cpe:2.3:a:amazon_ion:amazon_ion_java:*:*:*:*:*:*:*:*
Vendors & Products Amazon Ion
Amazon Ion amazon Ion Java
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Amazon Ion Amazon Ion Java
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-08-18T19:52:20.092Z

Reserved: 2026-08-18T15:50:51.183Z

Link: CVE-2026-75936

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-18T20:17:34.317

Modified: 2026-08-18T20:17:34.317

Link: CVE-2026-75936

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-409

    Improper Handling of Highly Compressed Data (Data Amplification)