{"action":"Upgrade firefox-esr to 78.7.0esr-1 or later.","affected":[{"fixed":"78.7.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["78.7.0esr-1"],"id":"tcs_01M5NEXT7GPJZTPCC4DVJGHR74","modified_at":"2026-10-26T12:02:31.112950758Z","published_at":"2021-01-07T14:15:12.173Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-26976","https://security-tracker.debian.org/tracker/CVE-2020-26976"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-26976","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-26976"}],"summary":"When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe n"}