Uncontrolled Memory Allocation in ion-java - CVE-2026-75935
Published: August 19, 2026
Vulnerability identifier: #VU144311
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-75935
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to memory allocation with excessive size value in the binary Ion stream cursor when parsing a crafted Ion binary document with a declared-length field. A remote attacker can send a specially crafted Ion binary document to cause a denial of service.
The issue can trigger excessive heap preallocation based on the declared length value.
Affected software
ion-java
How to mitigate CVE-2026-75935
Install security update from vendor's website.
ion-java - update to 1.12.0