CVE-2026-59162 Excelize: Negative shared-string index causes panic in GetCellValue and GetRows

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, Excelize parses shared-string cell values with strconv.Atoi and checks only the upper bound before indexing the shared string slice, allowing an XLSX file containing a shared-string cell with ...

CVE-2026-59162

The CVE concerns the Go-based Excelize library (v2.x) where, prior to 2.11.0, shared-string cell values could be indexed with -1, causing a panic in GetCellValue and GetRows. The issue stems from parsing shared-strings with strconv.Atoi and only an upper bound check before indexing the sharedStri...