CVE-2026-74938
Undergoing Analysis Undergoing Analysis - In Progress

Mitigation Bypass in Firefox JavaScript GC Component

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-74938
EUVD
EUVD-2026-60676

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 154 (inc)
mozilla firefox_esr to 153.1 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a mitigation bypass in the JavaScript garbage collection component of Firefox. It allows attackers to bypass security measures, potentially leading to arbitrary code execution or other malicious activities.

Impact Analysis

If exploited, this vulnerability could allow attackers to run malicious code on your system, steal sensitive data, or perform actions as if they were you. Users of affected Firefox versions are at risk until they update to Firefox 154 or Firefox ESR 153.1.

Mitigation Strategies

Update Firefox to version 154 or later and Firefox ESR to version 153.1 or later to address the mitigation bypass in the JavaScript: GC component.

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