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CVSS v3.1
6.3
EPSS
0.56%
Published
Nov 28, 2025
Modified
Dec 3, 2025
Public PoC / Exploit (1)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
Description
fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:LWeaknesses (CWE)
Affected Products (1)
References (3)