CVE-2026-12321

CVE-2026-12321: JIT miscompilation in the JavaScript: WebAssembly component

Published June 16, 2026
Last update June 16, 2026
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CVSS base score

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What the vulnerability does

01Description

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 152.

Key dates

02Disclosure timeline

June 16, 2026 CVE published