{"action":"Upgrade thunderbird to 1:140.14.0esr-1~deb13u1 or later.","affected":[{"fixed":"1:140.14.0esr-1~deb13u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:140.14.0esr-1~deb13u1"],"id":"tcs_01M5NVBD8JYKJD6NQEWNPT8F0P","modified_at":"2026-10-01T03:03:41.876366179Z","published_at":"2026-08-18T13:17:30.233Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-74939","https://security-tracker.debian.org/tracker/CVE-2026-74939"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-74939#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-74939"}],"summary":"Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and"}