CVE-2026-107225

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.8.0 to 2.11.0, GetStyle's fill, border, and font extraction predicates check only upper bounds for attacker-controlled style-table indices. File.GetStyle relies on extractStyleCondFuncs predicates that allow negative FillID, BorderID, and FontID values to reach slice indexing. When a crafted styles.xml supplies a negative fillId, borderId, or fontId and the application reads the style, a negative identifier passes the upper-bound-only predicate and becomes a negative slice index, allowing an attacker to panic while reading cell styling. No fixed version is available as of this review.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-25)

CWEs

CWE-20, CWE-129

Published

2026-10-07

Modified

2026-10-13

Record from

the NVD, synced 2026-10-19

Affected

• excelize:excelize

Packages (OSV)

References

• https://github.com/qax-os/excelize/commit/ae2113b410e51f6a141c396a59eda8c42b91bc22
• https://github.com/qax-os/excelize/pull/2367
• https://github.com/qax-os/excelize/security/advisories/GHSA-5h23-36rv-pm65
• https://github.com/qax-os/excelize/security/advisories/GHSA-5h23-36rv-pm65

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