{"action":"Upgrade firefox-esr to 153.5.0esr-1~deb13u1 or later.","affected":[{"fixed":"153.5.0esr-1~deb13u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["153.5.0esr-1~deb13u1"],"id":"tcs_01M5NPY0XR3E7HKC9R8E44Z52C","modified_at":"2026-10-26T20:00:11.119481020Z","published_at":"2026-10-13T13:17:26.630Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109757","https://security-tracker.debian.org/tracker/CVE-2026-109757"],"severity":{"label":"high","score":8.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109757#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109757"}],"summary":"Sandbox escape due to race condition in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}