{"action":"Upgrade firefox-esr to 91.4.0-r0 or later.","affected":[{"fixed":"91.4.0-r0","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.17","exploited":false,"fixed_versions":["91.4.0-r0"],"id":"tcs_01M6GZ0RJ6HNFFFDWMREXDX8TK","modified_at":"2026-11-03T06:32:47.823232479Z","published_at":"2021-12-08T22:15:09.840Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-43541","https://security.alpinelinux.org/vuln/CVE-2021-43541"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-43541#Alpine:v3.17/firefox-esr","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-43541"}],"summary":"When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and"}