CVE ID:	CVE-2020-26958
Description:	Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-26958 https://www.mozilla.org/security/advisories/mfsa2020-50/ https://www.mozilla.org/security/advisories/mfsa2020-51/ https://www.mozilla.org/security/advisories/mfsa2020-52/ https://bugzilla.mozilla.org/show_bug.cgi?id=1669355 https://bugzilla.mozilla.org/show_bug.cgi?id=1669355