{"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_01M5NPYCNNNC3KAQVVVVTQCE0K","modified_at":"2026-10-21T06:03:59.725576554Z","published_at":"2026-10-13T13:17:28.713Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-109778","https://security-tracker.debian.org/tracker/CVE-2026-109778"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-109778#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-109778"}],"summary":"Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5."}