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CVE-2020-26973 Affecting firefox-esr package, versions <78.6.0esr-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.26% (66th percentile)
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NVD
8.8 high
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Red Hat
8.8 high
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SUSE
7.5 high

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  • Snyk ID SNYK-DEBIAN12-FIREFOXESR-1546244
  • published 16 Dec 2020
  • disclosed 7 Jan 2021
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Introduced: 16 Dec 2020

CVE-2020-26973 Open this link in a new tab

How to fix?

Upgrade Debian:12 firefox-esr to version 78.6.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.