CVE-2026-78208

High

Open

TLP:CLEAR

exceljs through 4.4.0 Path Traversal via Unvalidated addImage filename

NVD CVE.org

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Description

exceljs-hardened before 5.0.0 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.

Details

CVSS Score: 8.7
CVSS Vector: 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
Confidence: 90%
Published: Aug 24, 2026
Last Modified: Aug 24, 2026

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