CVE-2026-12315

Public on 2026-06-16

Modified on 2026-06-19

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Severity

Medium

See what this means

CVSS v3 Base Score

5.4

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Firefox Extra	firefox	Pending Fix
Amazon Linux 2023	firefox	Pending Fix
Amazon Linux 2 - Firefox Extra	firefox-amzn-policies-generic	Not Affected

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-12315 Mitre: CVE-2026-12315