SEPTEMBER 19, 2026
Live Feed
Back to database
Case File

CVE-2026-74939

HIGH · CVSS 8.8 EPSS 0.30%

Source: NVD + CISA KEV + EPSS · Published 2026-08-18 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

A privilege escalation vulnerability exists in the DOM Navigation component of Firefox, allowing attackers to gain elevated permissions within the browser. This high-severity flaw affects users of Firefox versions prior to 154 and specific ESR releases, making it critical for organizations using these versions to prioritize updates to mitigate potential exploitation.

CVE
CVE-2026-74939
Severity
HIGH
CVSS
8.8
EPSS
0.30%
Firefox

Original NVD Description

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-84642 HIGH CVE-2026-84641 HIGH CVE-2026-84640 HIGH CVE-2026-84639 CRITICAL CVE-2026-84637 CRITICAL CVE-2026-84145 HIGH