SEPTEMBER 15, 2026
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Case File

CVE-2026-84119

CRITICAL · CVSS 9.6 EPSS 0.32%

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

A critical use-after-free vulnerability in the DOM Navigation component of Firefox allows for a sandbox escape, potentially enabling attackers to execute arbitrary code in the context of the browser. Users of affected Firefox versions should prioritize updating to Firefox 155 or the specified ESR versions to mitigate the risk of exploitation. Organizations relying on Firefox for secure browsing should take immediate action to ensure their installations are up to date.

CVE
CVE-2026-84119
Severity
CRITICAL
CVSS
9.6
EPSS
0.32%
Firefox

Original NVD Description

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

Related CVEs

Other vulnerabilities affecting the same vendor(s)