CVE-2026-54063 Details
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.
A denial-of-service vulnerability has been identified in the Excelize library for Go, specifically in versions prior to 2.11.0. The issue arises in the 'checkSheet()' function, which processes XML row attributes from Excel files without proper validation. This oversight allows for attacker-controlled row indices to be used, potentially leading to excessive memory allocation or runtime panics. Two exploitation variants have been documented: one causing out-of-memory errors by forcing large memory allocations, and another triggering panics by accessing invalid slice indices. The vulnerability affects any service that uses Excelize to read user-supplied XLSX files and calls cell retrieval functions, with no authentication required.
Users are advised to update to Excelize version 2.11.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/qax-os/excelize/releases/tag/v2.11.0 | [email protected] | Release Notes |
| https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| excelize excelize | < 2.11.0 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 16, 2026 | Initial Analysis | [email protected] |
| Jul 10, 2026 | CVE Modified | CISA-ADP |
| Jul 10, 2026 | New CVE Received | [email protected] |