xuri excelize up to 2.10.x XLSX file checkSheet length denial of service

Summaryinfo

A vulnerability described as problematic has been identified in xuri excelize up to 2.10.x. Impacted is the function checkSheet of the component XLSX file Handler. Executing a manipulation of the argument length can lead to denial of service. This vulnerability is handled as CVE-2026-54063. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in xuri excelize up to 2.10.x and classified as problematic. This vulnerability affects the function checkSheet of the component XLSX file Handler. The manipulation of the argument length with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r="N"> XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory process kill when r=2147483647 forces a ~16 GB allocation attempt, and (B) a runtime panic via out-of-bounds slice indexing when r=-1. Any service that opens attacker-supplied XLSX files and calls GetCellValue is affected. No authentication is required. This issue is fixed in version 2.11.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-54063 since 06/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.11.0 eliminates this vulnerability.

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Productinfo

Vendor

• xuri

Name

• excelize

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10

CPE 2.3info

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CPE 2.2info

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