Improper handling of highly compressed data in ion-java - CVE-2026-75936
Published: August 19, 2026
Vulnerability identifier: #VU144310
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-2026-75936
CWE-ID: CWE-409
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 improper handling of highly compressed data in the GZIP auto-decompression handler when parsing crafted compressed Ion documents. A remote attacker can send a specially crafted compressed Ion document to cause a denial of service.
The issue is triggered when the compressed input expands to an arbitrarily large size upon decompression.
Affected software
ion-java
How to mitigate CVE-2026-75936
Install security update from vendor's website.
ion-java - update to 1.12.0