CVE WatchJul 16, 2026

CVE-2026-54063

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github

CVSS

7.5

High

EPSS

0.6%

p45

KEV

—

Exploit Today

0-100

Published: Jul 10, 2026 · Last modified: Jul 16, 2026 · CWE-770

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-07-112026-07-17

Technical description

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.

Official references

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