CVE-2026-78209: fallo de gravedad alta en exceljs
exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.4epss 0.4%
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 · exceljsCVEs relacionadas — exceljs
En el mismo producto, de las más peligrosas a las menos.
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Referencias
https://github.com/exceljs/exceljshttps://github.com/exceljs/exceljs/blob/v4.4.0/lib/csv/csv.js#L109-L182https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-9wxc-4rhw-hfrwhttps://www.vulncheck.com/advisories/exceljs-through-csv-formula-injection-via-unescaped-cell-values