CVE-2018-20452: Libxls Project Libxls

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.

Affected products

Published 2018-12-25. Last modified 2026-06-17.