CVE-2026-4716
Received Received - Intake
Uninitialized Memory Vulnerability in Firefox JavaScript Engine

Publication date: 2026-03-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
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Meta Information
Published
2026-03-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-03-24
EPSS Evaluated
2026-06-14
NVD
CVE-2026-4716
EUVD
EUVD-2026-14848
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 149.0 (exc)
mozilla firefox to 140.9.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-908 The product uses or accesses a resource that has not been initialized.
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Executive Summary

This vulnerability involves incorrect boundary conditions and uninitialized memory in the JavaScript Engine component of Firefox. It affects versions of Firefox earlier than 149 and Firefox ESR earlier than 140.9.

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