CVE-2026-107223 Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max...

CVE-2026-107223

The Excelize Go language library (versions 2.1.0 to 2.11.0 ) is vulnerable to a Memory Allocation with Excessive Size Value (CWE-789) flaw. The root cause is that the flatCols() function expands file-loaded column ranges without validating Min and Max against the MaxColumns limit. Specifically, w...