CVE-2026-74935: Vulnerability in Mozilla Firefox
Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
AI Analysis
Technical Summary
CVE-2026-74935 is a high-impact privilege escalation vulnerability affecting the DOM Networking component in Mozilla Firefox. It allows an attacker to escalate privileges within the browser context. The issue was fixed in Firefox 154 and Firefox ESR 115.39, 140.14, and 153.1. The vulnerability was publicly disclosed on August 18, 2026, with multiple Mozilla advisories detailing the fix alongside other security issues. No CVSS score is provided, but the vendor classifies the impact as high.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser environment, potentially leading to unauthorized actions or access within the browser context. The vendor rates the impact as high, indicating significant security implications if exploited.
Mitigation Recommendations
A fix is available and has been released by Mozilla. Users and administrators should update to Firefox 154 or Firefox ESR 115.39, 140.14, or 153.1 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-74935: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74935 is a high-impact privilege escalation vulnerability affecting the DOM Networking component in Mozilla Firefox. It allows an attacker to escalate privileges within the browser context. The issue was fixed in Firefox 154 and Firefox ESR 115.39, 140.14, and 153.1. The vulnerability was publicly disclosed on August 18, 2026, with multiple Mozilla advisories detailing the fix alongside other security issues. No CVSS score is provided, but the vendor classifies the impact as high.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser environment, potentially leading to unauthorized actions or access within the browser context. The vendor rates the impact as high, indicating significant security implications if exploited.
Mitigation Recommendations
A fix is available and has been released by Mozilla. Users and administrators should update to Firefox 154 or Firefox ESR 115.39, 140.14, or 153.1 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:57:27.168Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-75/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-76/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845502c6e8be0332367399
Added to database: 08/18/2026, 12:50:10 UTC
Last enriched: 08/18/2026, 14:22:23 UTC
Last updated: 08/18/2026, 16:06:09 UTC
Views: 2
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