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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Andrew Sutherland as the original reporter.", "affected_release": [{"advisory": "RHSA-2021:0290", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:78.7.0-2.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0297", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:78.7.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0288", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:78.7.0-2.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0298", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:78.7.0-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0285", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "firefox-0:78.7.0-2.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0397", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "thunderbird-0:78.7.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-02-03T00:00:00Z"}, {"advisory": "RHSA-2021:0289", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "firefox-0:78.7.0-2.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0299", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "thunderbird-0:78.7.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-01-28T00:00:00Z"}], "bugzilla": {"description": "Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been", "id": "1920649", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1920649"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-200", "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 < 84.", "The Mozilla Foundation Security Advisory describes this flaw as:\nWhen a HTTPS page 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."], "name": "CVE-2020-26976", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2021-01-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-26976\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-26976\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2020-26976"], "threat_severity": "Moderate"}