Vulnerability · NVD

CVE-2026-8964

HIGH 7.5 Published on 2026-05-19

Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

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

EPSS 0.03% exploit very unlikely percentile 9.9%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <151.0.0 Fixed in 151.0.0 Latest tracked 151.0.1 patched

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<151.0.0	cpe:2.3:a:mozilla:thunderbird:::::-:::*