{"action":"Upgrade thunderbird to 1:153.5.1esr-1~deb13u1 or later.","affected":[{"fixed":"1:153.5.1esr-1~deb13u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:153.5.1esr-1~deb13u1"],"id":"tcs_01M5NPWRSZC8W2ZWM7164T4RPQ","modified_at":"2026-10-28T09:47:28.629441377Z","published_at":"2026-10-13T13:17:20.587Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109705","https://security-tracker.debian.org/tracker/CVE-2026-109705"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109705#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109705"}],"summary":"Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158,"}