Is CVE-2026-78208 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78208?

CVE-2026-78208 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-78208

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.