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MFSA2020-50 Firefox: Security Vulnerabilities fixed in Firefox 83 (CVE-2020-26958)

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MFSA2020-50 Firefox: Security Vulnerabilities fixed in Firefox 83 (CVE-2020-26958)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
11/17/2020
Created
11/19/2020
Added
11/18/2020
Modified
12/14/2020

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)

  • mozilla-firefox-upgrade-83_0

References

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