CVE-2026-74937
Undergoing Analysis Undergoing Analysis - In Progress

Use-after-free in Firefox JavaScript GC

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Use-after-free 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-2026-74937
EUVD
EUVD-2026-60675

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the JavaScript garbage collection component of Firefox. It allows an attacker to exploit memory corruption after it has been freed, potentially leading to arbitrary code execution or crashes.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your system, steal data, or cause the browser to crash. It primarily affects users of vulnerable Firefox versions.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The description only mentions a use-after-free issue in Firefox's JavaScript garbage collection, fixed in versions 154 and ESR 153.1.

Mitigation Strategies

Update Firefox to version 154 or later and Firefox ESR to version 153.1 or later to address the use-after-free vulnerability in the JavaScript: GC component.

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