{"action":"Upgrade firefox-esr to 153.5.0esr-1~deb12u1 or later.","affected":[{"fixed":"153.5.0esr-1~deb12u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["153.5.0esr-1~deb12u1"],"id":"tcs_01M5NPWTESWVTMB9VKRJGY8RB5","modified_at":"2026-10-21T06:05:47.398052150Z","published_at":"2026-10-13T13:17:20.910Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109708","https://security-tracker.debian.org/tracker/CVE-2026-109708"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109708","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109708"}],"summary":"Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}