CVE-2026-92017: Vulnerability in Mozilla Firefox
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
CVE-2026-92017 is a privilege escalation vulnerability affecting the DOM Service Workers component in Mozilla Firefox. This vulnerability was addressed and fixed in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. The Mozilla advisories classify the impact of this vulnerability as high and include it among multiple security fixes released simultaneously. No CVSS score is provided, but the vendor's impact rating indicates significant risk if exploited.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser environment, potentially bypassing security restrictions and gaining unauthorized capabilities. The vendor rates the impact as high, indicating a serious security concern. There is no indication of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated or required beyond applying the official updates.
CVE-2026-92017: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92017 is a privilege escalation vulnerability affecting the DOM Service Workers component in Mozilla Firefox. This vulnerability was addressed and fixed in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. The Mozilla advisories classify the impact of this vulnerability as high and include it among multiple security fixes released simultaneously. No CVSS score is provided, but the vendor's impact rating indicates significant risk if exploited.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser environment, potentially bypassing security restrictions and gaining unauthorized capabilities. The vendor rates the impact as high, indicating a serious security concern. There is no indication of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated or required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:36.513Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-91/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6055bf5e2cf5d30fdb
Added to database: 09/15/2026, 12:47:28 UTC
Last enriched: 09/15/2026, 13:32:41 UTC
Last updated: 09/15/2026, 22:11:29 UTC
Views: 4
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