CVE-2026-107218
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets.
Impact
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.10.1 to 2.11.0, RIGHT validates the requested length with UTF-16 code-unit counts but slices a rune array using Unicode code-point counts. RIGHT reaches leftRight through CalcCellValue, where countUTF16String validates one unit but utf8.RuneCountInString supplies the slice index in another. When RIGHT evaluates supplementary-plane text with a requested character count between the rune count and UTF-16 code-unit count, the inconsistent units produce a negative rune-slice index, allowing an attacker to panic during formula evaluation. No fixed version is available as of this review.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/xuri/excelize/v2 | >= 2.10.1, < 2.11.1-0.20260908032718-ecd99d761fe0 | 2.11.1-0.20260908032718-ecd99d761fe0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Excelize | Excelize | from 2.10.1 through 2.11.0 |