CVE-2026-92055: Vulnerability in Mozilla Firefox
Privilege escalation in the DevTools component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-92055, affects the DevTools component of Mozilla Firefox and enables privilege escalation. The flaw was resolved by Mozilla in Firefox 156 and Firefox ESR 153.3. The vendor advisory confirms the fix and categorizes the impact as high. There are no indications of active exploitation.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling unauthorized actions or access to restricted browser features. However, the vulnerability has been fixed in the latest versions, mitigating the risk for updated users.
Mitigation Recommendations
Users and administrators should update Firefox to version 156 or later, or Firefox ESR 153.3 or later, to remediate this vulnerability. Applying these official fixes fully addresses the issue. No additional mitigation steps are necessary once the update is applied.
CVE-2026-92055: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the DevTools component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-92055, affects the DevTools component of Mozilla Firefox and enables privilege escalation. The flaw was resolved by Mozilla in Firefox 156 and Firefox ESR 153.3. The vendor advisory confirms the fix and categorizes the impact as high. There are no indications of active exploitation.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling unauthorized actions or access to restricted browser features. However, the vulnerability has been fixed in the latest versions, mitigating the risk for updated users.
Mitigation Recommendations
Users and administrators should update Firefox to version 156 or later, or Firefox ESR 153.3 or later, to remediate this vulnerability. Applying these official fixes fully addresses the issue. No additional mitigation steps are necessary once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:16.112Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6755bf5e2cf5d3100f
Added to database: 09/15/2026, 12:47:35 UTC
Last enriched: 09/15/2026, 13:02:48 UTC
Last updated: 09/16/2026, 02:33:58 UTC
Views: 8
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