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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-5h23-36rv-pm65 Excelize: GetStyle panics on a negative fillId, borderId or fontId in styles.xml
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 07 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Qax-os
Qax-os excelize
Vendors & Products Qax-os
Qax-os excelize

Wed, 07 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Excelize: GetStyle panics on a negative fillId, borderId or fontId in styles.xml
Weaknesses CWE-129
CWE-20
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T18:55:55.603Z

Reserved: 2026-10-07T14:34:14.816Z

Link: CVE-2026-107225

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-07T19:17:35.333

Modified: 2026-10-07T19:17:35.333

Link: CVE-2026-107225

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T20:45:07Z

Weaknesses