CVE-2025-15279: Fontforge

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of pixels within BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27517.

Affected products

• Fontforge Fontforge: version 20251009 only

Published 2025-12-31. Last modified 2026-06-17.