Description
Logins saved by Firefox should be managed by the Password Manager component which uses encryption to save files on-disk. Instead, the username (not password) was saved by the Form Manager to an unencrypted file on disk. This vulnerability affects Firefox < 106.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 106 | 106 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 106.0.2+build1-0ubuntu0.20.04.1 | USN-5709-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.20.04.1 | — |
| Ubuntu 18.04 LTS | firefox | 106.0.2+build1-0ubuntu0.18.04.1 | USN-5709-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.18.04.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 106.0-1.1 | openSUSE-SU-2024:12429-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 4
- USN-5709-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:12429-1 MozillaFirefox-106.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1791 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen ermöglichen Codeausführung BSI CERT-Bund (WID) · Nov 16, 2023