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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Amazon | ion-java | < 1.12.1 | 1.12.1 |
References
- https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1 patch release-notes
- https://aws.amazon.com/security/security-bulletins/2026-100-aws/ vendor-advisory