Red Hat: CVE-2020-26958: CVE-2020-26958 Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions (Multiple Advisories)
4
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
11/30/2020
12/02/2020
12/01/2020
12/15/2023
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.
Solution(s)
- redhat-upgrade-firefox
- redhat-upgrade-firefox-debuginfo
- redhat-upgrade-firefox-debugsource
- redhat-upgrade-thunderbird
- redhat-upgrade-thunderbird-debuginfo
- redhat-upgrade-thunderbird-debugsource
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