{"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_01M5NPX6T1WZK23X2GD9RY4K76","modified_at":"2026-10-26T20:00:08.901849660Z","published_at":"2026-10-13T13:17:22.907Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109724","https://security-tracker.debian.org/tracker/CVE-2026-109724"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109724#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109724"}],"summary":"Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}