{"action":"Upgrade thunderbird to 1:78.7.0-1 or later.","affected":[{"fixed":"1:78.7.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:78.7.0-1"],"id":"tcs_01M5NFF6877AR0D279R3ABH079","modified_at":"2026-10-23T18:02:52.203942281Z","published_at":"2021-02-26T03:15:13.433Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-23953","https://security-tracker.debian.org/tracker/CVE-2021-23953"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-23953#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-23953"}],"summary":"If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects F"}