CVE-2026-107223: excelize >= 2.1.0, <= 2.11.0

Affected technology

excelize · >= 2.1.0, <= 2.11.0
qax-os

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · Passive user interaction

What an attacker can do

The source says when a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. Vendor/CNA’s CVSS 4.0 assessment (base score 7.1/10) rates confidentiality and integrity impact as none; availability impact as high.