{"action":"Upgrade firefox-esr to 78.7.0esr-1 or later.","affected":[{"fixed":"78.7.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["78.7.0esr-1"],"id":"tcs_01M5NFF71PAREQVH3PBAHTRES4","modified_at":"2026-10-23T18:02:52.255783812Z","published_at":"2021-02-26T03:15:13.917Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-23960","https://security-tracker.debian.org/tracker/CVE-2021-23960"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-23960","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-23960"}],"summary":"Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and"}