CVE-2026-75935

Memory-amplification denial of service via declared-length preallocation in Amazon ion-java

Published Aug 18, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

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
First Time appeared Amazon
Amazon ion
Vendors & Products Amazon
Amazon ion
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 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.
Title Memory-amplification denial of service via declared-length preallocation in Amazon ion-java
First Time appeared Amazon Ion
Amazon Ion amazon Ion Java
Weaknesses CWE-789
CPEs cpe:2.3:a:amazon_ion:amazon_ion_java:*:*:*:*:*:*:*:*
Vendors & Products Amazon Ion
Amazon Ion 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
Aug 19, 2026, 1:06 PM
Reserved
Aug 18, 2026, 3:50 PM
Status
Awaiting Analysis
Published
Aug 18, 2026, 8:17 PM
Modified
Oct 22, 2026, 10:10 PM