CVE-2026-78209highCWE-1236

exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 8.4epss 0.3%

probabilidad de explotación

0.3%top 78% de las CVE

explotación observada

noninguna fuente lo reporta

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

Productos afectados

exceljs · exceljs

Referencias

https://github.com/exceljs/exceljs https://github.com/exceljs/exceljs/blob/v4.4.0/lib/csv/csv.js#L109-L182 https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-9wxc-4rhw-hfrw https://www.vulncheck.com/advisories/exceljs-through-csv-formula-injection-via-unescaped-cell-values