CVE-2026-75936 Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java
Remote attackers can cause denial of service in Amazon ion-java by sending crafted GZIP-compressed Ion documents that expand excessively during decompression.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-75936?
CVE-2026-75936 is a high-severity denial of service vulnerability in Amazon Ion Java, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-409
Which versions are affected by CVE-2026-75936?
How do I fix CVE-2026-75936?
No fix has been published for CVE-2026-75936 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-75936 being exploited?
There is no known exploitation of CVE-2026-75936 in the wild and no public exploit code.
Sources
Also known as GHSA-wj53-jv76-65mc.