CVE-2026-100807: Vulnerability in Mozilla Firefox
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
AI Analysis
Technical Summary
This vulnerability involves privilege escalation within the DOM's Service Workers component in Mozilla Firefox. It was addressed and fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The vendor advisory lists this as a high impact issue and includes it among multiple security vulnerabilities resolved in the specified Firefox versions.
Potential Impact
The vulnerability allows privilege escalation in the browser, which could enable an attacker to gain higher privileges than intended within the Firefox environment. This could potentially lead to unauthorized actions or access within the browser context. The vendor rates the impact as high.
Mitigation Recommendations
A fix is available and has been released in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability.
CVE-2026-100807: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
pkg:github/mozilla/firefoxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves privilege escalation within the DOM's Service Workers component in Mozilla Firefox. It was addressed and fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The vendor advisory lists this as a high impact issue and includes it among multiple security vulnerabilities resolved in the specified Firefox versions.
Potential Impact
The vulnerability allows privilege escalation in the browser, which could enable an attacker to gain higher privileges than intended within the Firefox environment. This could potentially lead to unauthorized actions or access within the browser context. The vendor rates the impact as high.
Mitigation Recommendations
A fix is available and has been released in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:18:01.257Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","vendor":"Mozilla"}]
Threat ID: 6abbb3f5f7a7c541066409ae
Added to database: 09/29/2026, 12:49:57 UTC
Last enriched: 09/29/2026, 13:17:38 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 6
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