CVE-2026-100809
Public on 2026-09-29
Modified on 2026-10-01
Description
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Firefox Extra | firefox | 2026-10-12 | ALAS2FIREFOX-2026-066 | Fixed |
| Amazon Linux 2023 | firefox | 2026-10-12 | ALAS2023-2026-3214 | Fixed |
| Amazon Linux 2027 Preview | firefox | 2026-10-12 | ALAS2027-2026-190 | Fixed |
| Amazon Linux 2 - Firefox Extra | firefox-amzn-policies-generic | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N |