{"action":"Upgrade firefox-esr to 78.5.0esr-1 or later.","affected":[{"fixed":"78.5.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["78.5.0esr-1"],"id":"tcs_01M5NEXM5K1640SW1AK05GKE12","modified_at":"2026-10-26T12:02:41.718220185Z","published_at":"2020-12-09T01:15:13.143Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-26959","https://security-tracker.debian.org/tracker/CVE-2020-26959"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-26959#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-26959"}],"summary":"During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerabili"}