CVE-2026-75935 Memory-amplification denial of service via declared-length preallocation in Amazon ion-java
Remote attackers can cause denial of service in applications using Amazon ion-java by sending crafted binary documents that trigger excessive memory allocation.
- 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-2026-75935?
CVE-2026-75935 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
Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation.
To remediate this issue, users should upgrade to version 1.12.0.
Weakness: CWE-789
Which versions are affected by CVE-2026-75935?
How do I fix CVE-2026-75935?
No fix has been published for CVE-2026-75935 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-2026-75935 being exploited?
There is no known exploitation of CVE-2026-75935 in the wild and no public exploit code.
Sources
Also known as GHSA-822f-6gg9-whr5.