{"id":"CVE-2020-26976","details":"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 not being a secure context due to the (insecure) framing. This vulnerability affects Firefox \u003c 84.","modified":"2026-03-15T22:35:26.683299Z","published":"2021-01-07T14:15:12.173Z","related":["MGASA-2021-0065","MGASA-2021-0066","SUSE-SU-2021:0241-1","SUSE-SU-2021:0245-1","SUSE-SU-2021:0246-1","SUSE-SU-2021:0257-1","SUSE-SU-2021:0259-1","SUSE-SU-2021:14609-1","openSUSE-SU-2021:0208-1","openSUSE-SU-2021:0209-1","openSUSE-SU-2021:0222-1","openSUSE-SU-2021:0223-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202102-02"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4840"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4842"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-54/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/02/msg00001.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/02/msg00002.html"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1674343"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26976.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"84.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}