{"action":"Upgrade firefox-esr to 60.7.0esr-1 or later.","affected":[{"fixed":"60.7.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["60.7.0esr-1"],"id":"tcs_01M5NEDQSZ0ZPYFJQ1CJMQ4Y5J","modified_at":"2026-09-21T07:03:26.732047420Z","published_at":"2019-07-23T14:15:17.420Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-9820","https://security-tracker.debian.org/tracker/CVE-2019-9820"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-9820#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-9820"}],"summary":"A use-after-free vulnerability can occur in the chrome event handler when it is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7"}