SB2026110981 - Improper handling of highly compressed data in ion-java

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026110981

SB2026110981 - Improper handling of highly compressed data in ion-java

Published: November 9, 2026

Security Bulletin ID SB2026110981
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper handling of highly compressed data (CVE-ID: CVE-2026-85786)

CWE-ID: CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

CVSSv4: 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]


The vulnerability allows an unauthenticated remote attacker to cause a memory-amplification denial of service in applications using Amazon ion-java.

The vulnerability exists due to improper handling of highly compressed input by the GZIP auto-decompression handler, including an ineffective opt-out when processing crafted compressed Ion documents. An unauthenticated remote attacker can submit a document that expands to an arbitrarily large size during decompression and exhausts available memory.


Remediation

Install update from vendor's website.

References