CVE-2026-59161: CWE-400: Uncontrolled Resource Consumption in qax-os excelize
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small XLSX file with a row number above 1048576 and no cell coordinate to make GetRows append empty rows up to the attacker-controlled index and consume excessive memory and CPU. This issue is fixed in version 2.11.0.
AI Analysis
Technical Summary
CVE-2026-59161 describes an uncontrolled resource consumption vulnerability (CWE-400) in the qax-os excelize library before version 2.11.0. The streaming worksheet reader used by Rows and GetRows methods fails to enforce the maximum allowed row limit (TotalRows) on the row 'r' attribute. An attacker can craft a small XLSX file with a row number exceeding 1,048,576 and no cell coordinate, causing GetRows to append empty rows up to that index. This results in excessive memory and CPU usage. The vulnerability is resolved in excelize version 2.11.0.
Potential Impact
An attacker can cause a denial of service by triggering excessive memory and CPU consumption when processing a malicious XLSX file with an out-of-bounds row number. This can degrade or crash applications using vulnerable versions of excelize, impacting availability.
Mitigation Recommendations
Upgrade to excelize version 2.11.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-59161: CWE-400: Uncontrolled Resource Consumption in qax-os excelize
Description
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small XLSX file with a row number above 1048576 and no cell coordinate to make GetRows append empty rows up to the attacker-controlled index and consume excessive memory and CPU. This issue is fixed in version 2.11.0.
CVSS v4.0
Score 8.7high
Affected software
pkg:golang/github.com/qax-os/excelizeRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59161 describes an uncontrolled resource consumption vulnerability (CWE-400) in the qax-os excelize library before version 2.11.0. The streaming worksheet reader used by Rows and GetRows methods fails to enforce the maximum allowed row limit (TotalRows) on the row 'r' attribute. An attacker can craft a small XLSX file with a row number exceeding 1,048,576 and no cell coordinate, causing GetRows to append empty rows up to that index. This results in excessive memory and CPU usage. The vulnerability is resolved in excelize version 2.11.0.
Potential Impact
An attacker can cause a denial of service by triggering excessive memory and CPU consumption when processing a malicious XLSX file with an out-of-bounds row number. This can degrade or crash applications using vulnerable versions of excelize, impacting availability.
Mitigation Recommendations
Upgrade to excelize version 2.11.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-02T16:50:27.887Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a511ed668715ace43d68a0a
Added to database: 07/10/2026, 16:33:26 UTC
Last enriched: 07/18/2026, 15:22:00 UTC
Last updated: 08/23/2026, 22:52:12 UTC
Views: 103
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