CVE-2026-85786 - Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java
Bulletin ID: 2026-100-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 12:30 PM PDT Description: ion-java is a Java library that implements the Amazon Ion data format specification. We identified CVE-2026-85786, memory-amplification denial of service via highly compressed data expansion. ion-java 1.12.0 added a GZIP auto-decompression opt-out for CVE-2026-75936, but the implementation of the opt-out in 1.12.0 was insufficient to address the issue. Impacted versions: < 1.12.1 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CVE-2026-85786 - Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java
Description
Bulletin ID: 2026-100-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 12:30 PM PDT Description: ion-java is a Java library that implements the Amazon Ion data format specification. We identified CVE-2026-85786, memory-amplification denial of service via highly compressed data expansion. ion-java 1.12.0 added a GZIP auto-decompression opt-out for CVE-2026-75936, but the implementation of the opt-out in 1.12.0 was insufficient to address the issue. Impacted versions: < 1.12.1 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
Technical Details
- Classification
- {"confidence":0.88,"severitySource":"heuristic","classifier":"rss-v2"}
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-100-aws/","fetched":true,"fetchedAt":"2026-09-04T19:35:13.679Z","wordCount":128}
Threat ID: 6a9b1d71acd9273b491f2d96
Added to database: 09/04/2026, 19:35:13 UTC
Last updated: 09/04/2026, 22:22:07 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.