exceljs-hardened versions before 5.0.0 fail to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inject formulas that execute when the CSV file is opened in a spreadsheet application, potentially exfiltrating data or performing other malicious actions.
Metrics
Affected Vendors & Products
References
History
Mon, 24 Aug 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Exceljs
Exceljs exceljs |
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| Vendors & Products |
Exceljs
Exceljs exceljs |
Mon, 24 Aug 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Mon, 24 Aug 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | exceljs-hardened versions before 5.0.0 fail to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inject formulas that execute when the CSV file is opened in a spreadsheet application, potentially exfiltrating data or performing other malicious actions. | |
| Title | exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values | |
| First Time appeared |
Exceljs Project
Exceljs Project exceljs |
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| Weaknesses | CWE-1236 | |
| CPEs | cpe:2.3:a:exceljs_project:exceljs:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Exceljs Project
Exceljs Project exceljs |
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| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-24T00:30:48.493Z
Updated: 2026-08-24T18:02:29.223Z
Reserved: 2026-08-24T00:15:01.656Z
Link: CVE-2026-78209
Updated: 2026-08-24T18:02:24.614Z
Status : Received
Published: 2026-08-24T01:16:58.423
Modified: 2026-08-24T18:17:31.060
Link: CVE-2026-78209
No data.