{"action":"Upgrade thunderbird to 1:140.13.0esr-2~deb12u1 or later.","affected":[{"fixed":"1:140.13.0esr-2~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.13.0esr-2~deb12u1"],"id":"tcs_01M5NQPSMCT9R42TKJHTAPXQHZ","modified_at":"2026-10-25T09:47:42.607008575Z","published_at":"2026-07-21T13:17:04.310Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-16358","https://security-tracker.debian.org/tracker/CVE-2026-16358"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-16358#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-16358"}],"summary":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}