CVE-2020-28633: Cgal Computational Geometry Algorithms Library

High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.

Multiple code execution vulnerabilities exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger any of these vulnerabilities. An oob read vulnerability exists in Nef_S2/SNC_io_parser.h SNC_io_parser<EW>::read_sedge() seh->prev().

Affected products

• Cgal Computational Geometry Algorithms Library: version 5.1.1 only
• Debian Debian Linux: version 10.0 only

Published 2022-04-18. Last modified 2026-06-17.