CVE-2026-12321

MediumCVSS 5.4

Published: 16/06/2026(UTC)Updated: 16/06/2026(UTC)Translated: 17/06/2026(UTC)NVD NIST

Summary

CVE-2026-12321 involves a JIT miscompilation in the JavaScript: WebAssembly component. This issue was fixed in Firefox 152 and Thunderbird 152.

Organizations may be exposed to attacks exploiting this vulnerability, potentially leading to unauthorized access or execution of malicious code.

It is recommended to update Firefox and Thunderbird to version 152 or later to mitigate this vulnerability.

Original NVD description (English source)

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