CVE-2026-0884

CVE-2026-0884: Use-after-free in the JavaScript Engine component

Published January 13, 2026
Last update April 13, 2026
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CVSS base score

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What the vulnerability does

01Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Key dates

02Disclosure timeline

January 13, 2026 CVE published
April 13, 2026 Record updated