SEPTEMBER 7, 2026
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Case File

CVE-2026-16355

CRITICAL · CVSS 9.8 EPSS 0.40%

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

CyberRota Analysis

AI-Generated

A critical vulnerability in the Just-In-Time (JIT) compilation process of the JavaScript engine affects Firefox and Java, potentially allowing attackers to execute arbitrary code. Organizations using these products should prioritize patching to mitigate the risk of exploitation, particularly those in environments where web applications are heavily utilized. Immediate updates to Firefox and Thunderbird versions 153 or later, as well as the specified ESR versions, are essential for maintaining security.

CVE
CVE-2026-16355
Severity
CRITICAL
CVSS
9.8
EPSS
0.40%
Firefox Java

Original NVD Description

JIT miscompilation in the JavaScript Engine: JIT 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)