XML Injection Affecting fonttools package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN11-FONTTOOLS-14151605
- published30 Nov 2025
- disclosed29 Nov 2025
Introduced: 29 Nov 2025
NewCVE-2025-66034 (opens in a new tab)How to fix?
There is no fixed version for Debian:11 fonttools.
NVD Description
Note: Versions mentioned in the description apply only to the upstream fonttools package and not the fonttools package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
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.