{"action":"Upgrade firefox-esr to 45.9.0esr-1 or later.","affected":[{"fixed":"45.9.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["45.9.0esr-1"],"id":"tcs_01M5NCEKRC9CFKEY1FYGVR6193","modified_at":"2026-09-01T20:03:48.260059291Z","published_at":"2018-06-11T21:29:06.107Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2017-5442","https://security-tracker.debian.org/tracker/CVE-2017-5442"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2017-5442","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2017-5442"}],"summary":"A use-after-free vulnerability during changes in style when manipulating DOM elements. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45."}