{"action":"Upgrade thunderbird to 1:128.10.0esr-1~deb12u1 or later.","affected":[{"fixed":"1:128.10.0esr-1~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:128.10.0esr-1~deb12u1"],"id":"tcs_01M5NNVKWZ8W9JRD8HGZ5E4MD5","modified_at":"2026-10-06T09:47:37.425555483Z","published_at":"2025-04-29T14:15:35.003Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-4083","https://security-tracker.debian.org/tracker/CVE-2025-4083"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-4083#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-4083"}],"summary":"A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended fr"}