CVE-2026-8964: Vulnerability in Mozilla Firefox
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
AI Analysis
Technical Summary
CVE-2026-8964 is a spoofing vulnerability affecting the Popup Blocker component in Mozilla Firefox. Spoofing vulnerabilities typically allow an attacker to deceive users or software by presenting false information or interfaces. Mozilla fixed this issue in Firefox 151 as part of a security advisory that addressed multiple vulnerabilities. The advisory categorizes this particular vulnerability as low impact. No CVSS score is provided, and no known exploitation has been reported. The fix is included in the official Firefox 151 release.
Potential Impact
The impact of CVE-2026-8964 is considered low according to the Mozilla advisory. The vulnerability could allow spoofing via the Popup Blocker component, potentially misleading users or interfering with expected browser behavior. There are no reports of active exploitation in the wild. The overall security risk is mitigated by updating to Firefox 151 or later.
Mitigation Recommendations
Mozilla has fixed this vulnerability in Firefox 151. Users and administrators should update their Firefox installations to version 151 or later to remediate this issue. Since this is an official fix, no additional mitigation steps are required beyond applying the update.
CVE-2026-8964: Vulnerability in Mozilla Firefox
Description
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8964 is a spoofing vulnerability affecting the Popup Blocker component in Mozilla Firefox. Spoofing vulnerabilities typically allow an attacker to deceive users or software by presenting false information or interfaces. Mozilla fixed this issue in Firefox 151 as part of a security advisory that addressed multiple vulnerabilities. The advisory categorizes this particular vulnerability as low impact. No CVSS score is provided, and no known exploitation has been reported. The fix is included in the official Firefox 151 release.
Potential Impact
The impact of CVE-2026-8964 is considered low according to the Mozilla advisory. The vulnerability could allow spoofing via the Popup Blocker component, potentially misleading users or interfering with expected browser behavior. There are no reports of active exploitation in the wild. The overall security risk is mitigated by updating to Firefox 151 or later.
Mitigation Recommendations
Mozilla has fixed this vulnerability in Firefox 151. Users and administrators should update their Firefox installations to version 151 or later to remediate this issue. Since this is an official fix, no additional mitigation steps are required beyond applying the update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:30:07.287Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"}]
Threat ID: 6a0c677fec166c07b0a99800
Added to database: 5/19/2026, 1:37:03 PM
Last enriched: 5/19/2026, 1:54:02 PM
Last updated: 5/20/2026, 4:58:36 PM
Views: 9
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