CVE-2026-78209highCWE-1236

exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values

21Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 8.4epss 0.3%

probabilidade de exploração

0.3%top 78% das CVEs

exploração observada

nãonenhuma fonte 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

Produtos afetados

exceljs · exceljs

Referências

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