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CVE-2026-16410: Firefox JIT Engine Can Crash Due to Incorrect Code Generation

CVE-2026-16410 CVE-2026-16410

Summary

A bug in the Firefox JavaScript engine can cause it to crash or freeze. This issue affects Firefox users and can be fixed by updating to version 153 or later. Users should check for updates and install the latest version to ensure they have the latest security patches.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions
mozilla	firefox	All versions

Original title

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153.

Original description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153.

Vulnerability type

CWE-843 Type Confusion

https://bugzilla.mozilla.org/show_bug.cgi?id=2053680
https://www.mozilla.org/security/advisories/mfsa2026-68/

Published: 21 Jul 2026 · Updated: 23 Jul 2026 · First seen: 21 Jul 2026