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OpenAdvisories
High · 7.5 CVE-2026-75936 EUVD-2026-61174

Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java

Published Aug 18, 2026 · Updated Aug 19, 2026 · Assigned by AMZN

Description

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.

Affected products

VendorProductAffectedFixed
Amazon Ion Amazon Ion Java < 1.12.0 1.12.0

References