CVE-2018-20304: Libexcel Project Libexcel

Medium severity, CVSS 6.5. EPSS: 0.9% chance of exploitation in the next 30 days.

wbook_addworksheet in workbook.c in libexcel.a in libexcel 0.01 allows attackers to cause a denial of service (SEGV) via a long second argument. NOTE: this is not a Microsoft product.

Affected products

• Libexcel Project Libexcel: version 0.01 only

Published 2018-12-20. Last modified 2026-06-17.