AUGUST 4, 2026
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Case File

CVE-2026-4689

CRITICAL · CVSS 10 EPSS 0.66%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-03-24 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 10.0. It affects Firefox.

CVE
CVE-2026-4689
Severity
CRITICAL
CVSS
10
EPSS
0.66%
Firefox

Original NVD Description

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-16412 CRITICAL CVE-2026-16411 CRITICAL CVE-2026-16410 CRITICAL CVE-2026-16409 HIGH CVE-2026-16408 CRITICAL CVE-2026-16407 CRITICAL