CVE-2026-85786 - Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java
Cybersecurity Classified by Officially
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 12:15 PM PDT
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.
This issue has been addressed in ion-java version 1.12.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
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Provenance
- Organization
- Amazon Web Services — imported from official source
- Official source
- https://aws.amazon.com/security/security-bulletins/feed/ RSS
- Imported
- September 15, 2026 20:57
- Versions
- 2 recorded
- Identity
87ae1d98e3756d37112e0e60fca52f01c9da4414