CVE-2022-26387
7.5
HIGH
CVSS 3.1
EPSS 0.24%
Description
When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.
How to fix CVE-2022-26387
To remediate CVE-2022-26387, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 91.7.0esr-1~deb11u1 or later
- —upgrade to 1:91.7.0-2~deb11u1 or later
Is CVE-2022-26387 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 91.7.0esr-1~deb11u1
- from 0, < 1:91.7.0-2~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |