CVE-2026-92021: Use-after-free in the JavaScript Engine: JIT component

Published Sep 15, 2026

Updated

Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16.

Affected Software

1 affected component

Mozilla Firefox ESR=140.16

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Mozilla Firefox ESR to a version that resolves this vulnerability.
Fixed in 140.16

Event History

Sep 15, 2026

CVE Published

via MITRE·12:33 PM

Data Sourced

via MITRE·12:33 PM

Description

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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