SEPTEMBER 7, 2026
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Case File

CVE-2026-16351

CRITICAL · CVSS 9.8 EPSS 0.39%

Source: NVD + CISA KEV + EPSS · Published 2026-07-21 · Last synced 2026-08-20

CyberRota Analysis

AI-Generated

A critical use-after-free vulnerability in the DOM Navigation component of Firefox and Thunderbird allows attackers to escape the sandbox, potentially leading to arbitrary code execution. Organizations using affected versions of these applications should prioritize immediate updates to Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, or Thunderbird 140.13 to mitigate the risk of exploitation.

CVE
CVE-2026-16351
Severity
CRITICAL
CVSS
9.8
EPSS
0.39%
Firefox

Original NVD Description

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

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