Arbitrary Code Execution Affecting fonttools package, versions [,4.62.0)
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- published1 Apr 2026
- disclosed1 Apr 2026
- creditjsharp6968
Introduced: 1 Apr 2026
CVE NOT AVAILABLE CWE-94 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade fonttools to version 4.62.0 or higher.
Overview
fonttools is a Tools to manipulate font files
Affected versions of this package are vulnerable to Arbitrary Code Execution due to the parseBlendList() function's usage of built-in Python's eval() function when parsing TTX font data. An attacker can execute arbitrary scripts by supplying a specially crafted numeric value strings to TTX XML attributes.