CVE-2026-92040: Use-after-free in the JavaScript: WebAssembly component

Published Sep 15, 2026
·
Updated

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156.

Affected Software

1 affected component
Mozilla Firefox

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 156

Event History

Sep 15, 2026
CVE Published
via MITRE·12:34 PM
Data Sourced
via MITRE·12:34 PM
Description

Frequently Asked Questions

1

Which Firefox versions contain the fix?

The vulnerability was fixed in Firefox 156. The provided information does not identify the first affected version or any affected ESR releases.

Company

Resources

Contact

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