SEPTEMBER 19, 2026
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Case File

CVE-2026-74960

HIGH · CVSS 8.1 EPSS 0.16%

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

CyberRota Analysis

AI-Generated

A site isolation vulnerability in the WebExtensions component of Firefox could allow malicious web content to access sensitive data from other sites. This issue impacts users of affected Firefox versions prior to 154 and Firefox ESR versions prior to 140.14 and 153.1. Organizations using these versions should prioritize updating to mitigate potential data exposure risks.

CVE
CVE-2026-74960
Severity
HIGH
CVSS
8.1
EPSS
0.16%
Firefox

Original NVD Description

Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, 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