CVE-2026-8964
7.5 HIGHSpoofing issue in the Popup Blocker component
Published: 2026-05-19 · Last updated: 2026-05-20
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CWE
- CWE-451
Affected products
| Vendor | Product |
|---|---|
| mozilla | firefox, thunderbird |
Description
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Source: NVD
References
Related CVEs
Same vendor
- CVE-2026-12330 — Incorrect boundary conditions in the Internationalization component (5.4 MEDIUM)
- CVE-2026-12329 — Memory safety bug fixed in Thunderbird ESR 140.12 (5.3 MEDIUM)
- CVE-2026-12328 — Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151 (8.1 HIGH)
- CVE-2026-12323 — Spoofing issue in the DOM: Core & HTML component (5.4 MEDIUM)
- CVE-2026-12322 — Clickjacking issue in the Widget: Gtk component (5.4 MEDIUM)
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