{"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:v3.21","exploited":false,"fixed_versions":["91.4.0-r0"],"id":"tcs_01M6GWCCEBDGX53B6TH00ZBQSP","modified_at":"2026-11-03T06:32:41.553626512Z","published_at":"2021-12-08T22:15:09.730Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-43539","https://security.alpinelinux.org/vuln/CVE-2021-43539"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-43539#Alpine:v3.21/firefox-esr","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-43539"}],"summary":"Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free"}