CVE-2026-74938
Public on 2026-08-18
Modified on 2026-08-18
Description
Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Firefox Extra | firefox | 2026-08-31 | ALAS2FIREFOX-2026-064 | Fixed |
| Amazon Linux 2023 | firefox | 2026-08-31 | ALAS2023-2026-2105 | Fixed |
| Amazon Linux 2027 Preview | firefox | Pending Fix | ||
| Amazon Linux 2 - Firefox Extra | firefox-amzn-policies-generic | Not Affected | ||
| Amazon Linux 2 - Core | thunderbird | 2026-08-31 | ALAS2-2026-3880 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |