{"action":"Upgrade firefox-esr to 91.3.0-r0 or later.","affected":[{"fixed":"91.3.0-r0","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.20","exploited":false,"fixed_versions":["91.3.0-r0"],"id":"tcs_01M6H4N6P7A8C6A97TSTTSEFJS","modified_at":"2026-11-03T06:32:58.579941406Z","published_at":"2021-12-08T22:15:08.947Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-38507","https://security.alpinelinux.org/vuln/CVE-2021-38507"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-38507#Alpine:v3.20/firefox-esr","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-38507"}],"summary":"The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origi"}