cvedb.io
CVE-2025-66034
MEDIUM · CVSS 6.3
EPSS exploitation probability: 0%
Published 2025-11-29T01:16:02.967 · Last modified 2026-06-17T09:56:12.843

Summary

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.

Affected products

fonttools — fonttools

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.