exceljs through 4.4.0 contains a memory exhaustion vulnerability that allows attackers to crash applications by supplying a worksheet col element with an unbounded max attribute. Attackers can craft a small workbook with a huge max value, causing xlsx.load() to allocate hundreds of millions of Column objects and abort the process with an uncatchable heap out-of-memory error.
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Affected Vendors & Products
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Solution
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Workaround
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References
History
Fri, 13 Nov 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | exceljs through 4.4.0 contains a memory exhaustion vulnerability that allows attackers to crash applications by supplying a worksheet col element with an unbounded max attribute. Attackers can craft a small workbook with a huge max value, causing xlsx.load() to allocate hundreds of millions of Column objects and abort the process with an uncatchable heap out-of-memory error. | |
| Title | ExcelJS through 4.4.0 Memory Exhaustion via Unbounded Worksheet Column Range | |
| First Time appeared |
Exceljs Project
Exceljs Project exceljs |
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| Weaknesses | CWE-770 | |
| CPEs | cpe:2.3:a:exceljs_project:exceljs:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Exceljs Project
Exceljs Project exceljs |
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| References |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-13T09:33:37.051Z
Reserved: 2026-11-13T01:20:40.277Z
Link: CVE-2026-128338
Vulnrichment
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NVD
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Weaknesses