PT-2020-16586
CVE-2020-26973
·
Published
2020-12-15
·
Updated
2026-10-31
Description by
CVSS 3.1
8.8
HighMetricsAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 84
Thunderbird versions prior to 78.6
Firefox ESR versions prior to 78.6
Description
The issue arises when certain input to the CSS Sanitizer causes it to incorrectly remove components, potentially leading to a sanitizer bypass.
Recommendations
For Firefox versions prior to 84, update to version 84 or later.
For Thunderbird versions prior to 78.6, update to version 78.6 or later.
For Firefox ESR versions prior to 78.6, update to version 78.6 or later.
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