{"action":"Upgrade firefox-esr to 78.5.0-r0 or later.","affected":[{"fixed":"78.5.0-r0","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.22","exploited":false,"fixed_versions":["78.5.0-r0"],"id":"tcs_01M6GTA082C2F0FFARJ9875106","modified_at":"2026-11-03T06:32:37.216052493Z","published_at":"2020-12-09T01:15:12.957Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2020-26956","https://security.alpinelinux.org/vuln/CVE-2020-26956"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2020-26956#Alpine:v3.22/firefox-esr","url":"https://osv.dev/vulnerability/ALPINE-CVE-2020-26956"}],"summary":"In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird"}