CVE-2026-4696
Received Received - Intake
Use-After-Free in Firefox Text and Fonts Component

Publication date: 2026-03-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, 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-2026-4696
EUVD
EUVD-2026-14811
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox to 149.0 (exc)
mozilla firefox to 115.34.0 (exc)
mozilla firefox From 128.0 (inc) to 140.9.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a use-after-free issue in the Layout: Text and Fonts component of Firefox. It affects versions of Firefox earlier than 149, Firefox ESR versions earlier than 115.34, and Firefox ESR versions earlier than 140.9.

Impact Analysis

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