CVE-2026-107218
Description
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.
How to fix
- github.com/xuri/excelize/v22.11.1-0.20260908032718-ecd99d761fe0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| excelize excelize | 2.10.1 ≤ v ≤ 2.11.0 | — |
| github.com/xuri/excelize/v2Go | 2.10.1 ≤ v < 2.11.1-0.20260908032718-ecd99d761fe0 | 2.11.1-0.20260908032718-ecd99d761fe0 |
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