CVE-2026-78208: fallo de gravedad alta en exceljs
exceljs through 4.4.0 Path Traversal via Unvalidated addImage filename
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 8.7epss 0.5%
exceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage() function that fails to validate file paths. Attackers can supply arbitrary file paths to read any file accessible to the Node.js process and embed it in the generated workbook.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Productos afectados
exceljs · exceljsCVEs relacionadas — exceljs
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-78206HIGHexceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx DecompressionEPSS 0.6%CVE-2026-78207CRITICALexceljs through 4.4.0 Prototype Pollution via deepMerge Reached From Note SerializationEPSS 0.6%CVE-2026-78209HIGHexceljs through 4.4.0 CSV Formula Injection via Unescaped Cell ValuesEPSS 0.4%
Referencias
https://github.com/exceljs/exceljshttps://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/workbook.js#L142-L147https://github.com/exceljs/exceljs/blob/v4.4.0/lib/xlsx/xlsx.js#L421-L429https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-m8mg-8574-gm3mhttps://www.vulncheck.com/advisories/exceljs-through-path-traversal-via-unvalidated-addimage-filename