Vulnerability · Published Dec 22, 2022 · Assigned by mozilla
CVE-2022-26387
High 7.5
In plain English
A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 48.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 91.7.0-3.el8_5.alma | ALSA-2022:0818 |
| AlmaLinux:8 | thunderbird | 91.7.0-2.el8_5.alma | ALSA-2022:0845 |
| AlmaLinux:8 | thunderbird | 91.7.0-2.el8_5.alma.plus | ALSA-2022:0845 |
| Alpine:v3.20 | firefox | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.21 | firefox | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.22 | firefox | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.23 | firefox | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.20 | firefox-esr | 91.7.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.21 | firefox-esr | 91.7.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.22 | firefox-esr | 91.7.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.23 | firefox-esr | 91.7.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.21 | librewolf | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.22 | librewolf | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.23 | librewolf | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Alpine:v3.24 | librewolf | 98.0-r0 | ALPINE-CVE-2022-26387 |
| Debian:12 | firefox-esr | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 |
| Debian:13 | firefox-esr | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 |
| Debian:14 | firefox-esr | 91.7.0esr-1 | DEBIAN-CVE-2022-26387 |
| Debian:12 | thunderbird | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 |
| Debian:13 | thunderbird | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 |
| Debian:14 | thunderbird | 1:91.7.0-1 | DEBIAN-CVE-2022-26387 |
| Rocky Linux:8 | firefox | 0:91.7.0-3.el8_5 | RLSA-2022:0818 |
| Rocky Linux:8 | thunderbird | 0:91.7.0-2.el8_5 | RLSA-2022:0845 |
| Ubuntu:22.04:LTS | firefox | 1:1snap1-0ubuntu1 | UBUNTU-CVE-2022-26387 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2022-26387 |
| Ubuntu:22.04:LTS | thunderbird | 1:91.7.0+build2-0ubuntu1 | UBUNTU-CVE-2022-26387 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 98 |
| Mozilla | Firefox ESR | unspecified – before 91.7 |
| Mozilla | Thunderbird | unspecified – before 91.7 |
Weakness: CWE-367 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H