CVE-2026-92043: Privilege escalation due to incorrect boundary conditions in the Audio/Video component

Q: Which Firefox releases contain the fix?

The issue was fixed in Firefox 156 and Firefox ESR 153.3.

Q: What component is affected?

The vulnerability affects Firefox's Audio/Video component.

Published Sep 15, 2026

Updated

Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.

Affected Software

1 affected component

Firefox<156, <153.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 156
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 153.3

Event History

Sep 15, 2026

CVE Published

via MITRE·12:34 PM

Data Sourced

via MITRE·12:34 PM

Description

Frequently Asked Questions

Which Firefox releases contain the fix?

The issue was fixed in Firefox 156 and Firefox ESR 153.3.

What component is affected?

The vulnerability affects Firefox's Audio/Video component.