CVE-2026-8960

high

Description

Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

References

https://www.mozilla.org/security/advisories/mfsa2026-50/

https://www.mozilla.org/security/advisories/mfsa2026-46/

https://bugzilla.mozilla.org/show_bug.cgi?id=1940116

Details

Source: Mitre, NVD

Published: 2026-05-19

Updated: 2026-05-19

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Severity: High