Description
Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.



To remediate this issue, users should upgrade to version 1.12.1.
Published: 2026-09-04
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Fri, 04 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Description Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936. To remediate this issue, users should upgrade to version 1.12.1.
Title Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java
First Time appeared Amazon
Amazon ion-java
Weaknesses CWE-409
CPEs cpe:2.3:a:amazon:ion-java:*:*:*:*:*:*:*:*
Vendors & Products Amazon
Amazon ion-java
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'}

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-09-04T19:27:28.963Z

Reserved: 2026-09-04T16:58:12.405Z

Link: CVE-2026-85786

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-04T20:17:33.153

Modified: 2026-09-04T20:17:33.153

Link: CVE-2026-85786

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-409

    Improper Handling of Highly Compressed Data (Data Amplification)