{"action":"Upgrade fonttools to 4.57.0-1+deb13u1 or later.","affected":[{"fixed":"4.57.0-1+deb13u1","introduced":"0"}],"component":"fonttools","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.57.0-1+deb13u1"],"id":"tcs_01M5NP6SWT0ZCP8CEJ0AQNCCDG","modified_at":"2026-10-23T17:47:36.923800349Z","published_at":"2025-11-29T01:16:02.967Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-66034","https://security-tracker.debian.org/tracker/CVE-2025-66034"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-66034#Debian:13/fonttools","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-66034"}],"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 vul"}