CVE-2026-100818
Public on 2026-09-29
Modified on 2026-09-30
Description
Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Firefox Extra | firefox | Pending Fix | ||
| Amazon Linux 2023 | firefox | Pending Fix | ||
| Amazon Linux 2027 Preview | firefox | Pending Fix | ||
| Amazon Linux 2 - Firefox Extra | firefox-amzn-policies-generic | Not Affected | ||
| Amazon Linux 2 - Core | thunderbird | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 8.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |