{"action":"Upgrade firefox-esr to 140.9.1esr-1~deb13u1 or later.","affected":[{"fixed":"140.9.1esr-1~deb13u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["140.9.1esr-1~deb13u1"],"id":"tcs_01M5NT2Y19TCK2CYPMJC33GBNK","modified_at":"2026-10-25T09:47:32.990912741Z","published_at":"2026-04-07T13:16:47.347Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-5731","https://security-tracker.debian.org/tracker/CVE-2026-5731"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-5731#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-5731"}],"summary":"Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and w"}