VDB
CVE-2026-8964
CVE-2026-8964
PUBLISHED
CVSS 7.5 HIGH
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
EPSS 0.03% · 9.9th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
0.03%
9.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 151 |
| Mozilla | Thunderbird | 151 |
Timeline
- May 19, 2026 CVE Published
- May 19, 2026 CVE Updated
- May 20, 2026 EPSS Score
- May 20, 2026 Coalition ESS Score
- May 20, 2026 Security Advisory
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 27, 2026 EPSS Score
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2025170 url
- https://www.mozilla.org/security/advisories/mfsa2026-46/ url
- https://www.mozilla.org/security/advisories/mfsa2026-50/ url
- https://nvd.nist.gov/vuln/detail/CVE-2026-8964 advisory
- https://www.mozilla.org/security/advisories/mfsa2026-46 url
- https://www.mozilla.org/security/advisories/mfsa2026-50 url