fonttools vulnerabilities

Products

• fonttools 2

Latest fonttools CVEs

Newest publication first

1. CVE-2025-66034 fontTools is Vulnerable to Arbitrary File Write and XML injection in fontTools.varLib

   Published 2025-11-29

   Critical·CVSS 9.8

   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 fil...

2. CVE-2023-45139 fonttools XML External Entity Injection (XXE) Vulnerability

   Published 2024-01-10

   High·CVSS 7.5 EPSS 1.2%

   fontTools is a library for manipulating fonts, written in Python. The subsetting module has a XML External Entity Injection (XXE) vulnerability which allows an attacker to resolve arbitrary entities when a candidate font (OT-SVG fonts), which contains a SVG table, is parsed. This...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.