CVE-2026-85786

Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java

Published Sep 4, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Sep 4, 2026, 7:27 PM
Reserved
Sep 4, 2026, 4:58 PM
Status
Awaiting Analysis
Published
Sep 4, 2026, 8:17 PM
Modified
Sep 8, 2026, 2:00 PM