CVE-2026-78209 — exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values
exceljs through 4.4.0 fails to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inj…
Published: 2026-08-24 · CVSS: 8.4 · CVSS 4.0
exceljs through 4.4.0 fails 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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7