CVE-2026-8962: Vulnerability in Mozilla Firefox
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Analysis
Technical Summary
CVE-2026-8962 describes a mitigation bypass vulnerability within the Document Object Model (DOM) security component of Mozilla Firefox. This vulnerability could potentially allow bypassing certain security mitigations implemented in the browser's DOM handling. Mozilla fixed this vulnerability in Firefox version 151 and Firefox ESR 140.11. The advisory classifies the impact of this vulnerability as low, indicating limited risk compared to other vulnerabilities fixed in the same release cycle.
Potential Impact
The impact of CVE-2026-8962 is rated low by Mozilla. It involves a mitigation bypass in the DOM security component, which could theoretically weaken security protections but does not appear to lead directly to high-severity consequences such as code execution or sandbox escape. No known exploitation in the wild has been reported, reducing immediate risk.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 151 and Firefox ESR 140.11. Users and administrators should update to these versions or later to remediate the issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the update.
CVE-2026-8962: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8962 describes a mitigation bypass vulnerability within the Document Object Model (DOM) security component of Mozilla Firefox. This vulnerability could potentially allow bypassing certain security mitigations implemented in the browser's DOM handling. Mozilla fixed this vulnerability in Firefox version 151 and Firefox ESR 140.11. The advisory classifies the impact of this vulnerability as low, indicating limited risk compared to other vulnerabilities fixed in the same release cycle.
Potential Impact
The impact of CVE-2026-8962 is rated low by Mozilla. It involves a mitigation bypass in the DOM security component, which could theoretically weaken security protections but does not appear to lead directly to high-severity consequences such as code execution or sandbox escape. No known exploitation in the wild has been reported, reducing immediate risk.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 151 and Firefox ESR 140.11. Users and administrators should update to these versions or later to remediate the issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:29:59.235Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c677fec166c07b0a997f7
Added to database: 5/19/2026, 1:37:03 PM
Last enriched: 5/19/2026, 1:54:15 PM
Last updated: 5/20/2026, 1:33:45 PM
Views: 8
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