CVE-2026-2764

CVE-2026-2764: JIT miscompilation, use-after-free in the JavaScript Engine: JIT component

Published February 24, 2026
Last update July 15, 2026
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CVSS base score

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What the vulnerability does

01Description

JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Key dates

02Disclosure timeline

February 24, 2026 CVE published
July 15, 2026 Record updated