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

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

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

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'}

Subscriptions

Amazon Ion Amazon Ion Java
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-08-18T19:43:58.090Z

Reserved: 2026-08-18T15:50:50.728Z

Link: CVE-2026-75935

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses