{"action":"Upgrade firefox-esr to 91.4.0esr-1 or later.","affected":[{"fixed":"91.4.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["91.4.0esr-1"],"id":"tcs_01M5NG02R6MFSR7ZKB2DFAP6XF","modified_at":"2026-10-23T18:03:38.891365905Z","published_at":"2022-12-22T20:15:12.133Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4129","https://security-tracker.debian.org/tracker/CVE-2021-4129"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4129#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4129"}],"summary":"Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. Some of th"}