CVE-2025-66034 | BDVDB-2026-303349 Detail

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.

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Exploit#

History#

1. Version 12025-11-29Record published in the CVE List.
2. Version 22025-12-01Most recent update recorded in the CVE List.