CVE-2026-8949

Public on 2026-05-19

Modified on 2026-05-21

Description

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Severity

Medium

See what this means

CVSS v3 Base Score

6.3

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Firefox Extra	firefox	Not Affected
Amazon Linux 2023	firefox	Not Affected
Amazon Linux 2 - Core	thunderbird	Not Affected

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	6.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-8949 Mitre: CVE-2026-8949