{"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_01M5NPY1JMBPF2WYJZFEHZGD0T","modified_at":"2026-10-26T00:00:11.188756415Z","published_at":"2026-10-13T13:17:26.740Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109759","https://security-tracker.debian.org/tracker/CVE-2026-109759"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109759","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109759"}],"summary":"Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}