CVE-2026-75935

Amazon ion-java before 1.12.0 has uncontrolled heap preallocation in its binary Ion stream cursor. A crafted binary Ion document with a malicious declared-length field triggers excessive memory allocation, enabling remote denial of service. CVSS 7.5 HIGH; no in-the-wild exploitation reported. Upg...

CVE-2026-75935 Memory-amplification denial of service via declared-length preallocation in Amazon ion-java

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 shou...