CVE-2020-26973
8.8
HIGH
CVSS 3.1
EPSS 0.19%
Description
Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
How to fix CVE-2020-26973
To remediate CVE-2020-26973, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 78.6.0esr-1 or later
- —upgrade to 1:78.6.0-1 or later
Is CVE-2020-26973 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 78.6.0esr-1
- from 0, < 1:78.6.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |