Excelize ColumnNameToNumber: int64 overflow yields an out-of-domain coordinate with nil error, causing negative slice index panic on r="0" rows

Summary ColumnNameToNumber lib.go:220-237 accumulates the bijective base-26 value of a column name in an int64 with only an upper-bound check col MaxColumns applied after the loop and no overflow detection. A 14-letter column name whose true value is 3·2⁶⁴ — e.g. VGWQHXLSDVIKWV — wraps to col = 0...

GHSA-8MCQ-6WMR-JRJV Excelize: a row whose earlier cell has a higher column reference than its last cell panics index out of range on almost every worksheet read API

Affected versions and vulnerable location - Confirmed at ae2113b current HEAD. - Sink: rows.go:967 ws.SheetData.RowrowIdx.CcolNum-1 = colData inside checkRow. - checkRow computes lastCol from the column of the last cell in document order rows.go:940, allocates targetList of that length, then...

PT-2026-107655

Name of the Vulnerable Software and Affected Versions github.com/xuri/excelize/v2 versions 2.0.0 through 2.11.0 github.com/xuri/excelize versions 1.1.0 through 1.4.1 Description An issue exists where the ColumnNameToNumber function accumulates a bijective base-26 value in an int64 without detecti...