HIGH 8.7 NVD
CVE-2026-75936
Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial
Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression.
To remediate this issue, users should upgrade to version 1.12.0 and configure withGzipDecompressionEnabled(false) and/or set an explicit withMaximumBufferSize() when parsing untrusted input.
References
- https://aws.amazon.com/security/security-bulletins/2026-083-aws/
- https://github.com/amazon-ion/ion-java/releases/tag/v1.12.0
- https://github.com/amazon-ion/ion-java/security/advisories/GHSA-wj53-jv76-65mc
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-18 via NVD.
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