CVE-2026-92005

Analyzed Analyzed - Analysis Complete

Use-after-free in Firefox Web Codecs

Publication date: 2026-09-15

Last updated on: 2026-10-06

Assigner: Mozilla Corporation

Description

Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-15

Last Modified

2026-10-06

Generated

2026-10-19

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-92005

EUVD

EUVD-2026-78468

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	to 140.16.0 (exc)
mozilla	thunderbird	From 141.0 (inc) to 153.3.0 (exc)
mozilla	thunderbird	From 154.0 (inc) to 156.0 (exc)
mozilla	firefox	From 154.0.0 (inc) to 156.0.0 (exc)
mozilla	firefox	From 141.0 (inc) to 153.3.0 (exc)
mozilla	firefox	to 140.16.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in Firefox's Audio/Video: Web Codecs component. Use-after-free occurs when a program continues to use memory after it has been freed, potentially leading to crashes or arbitrary code execution.

Detection Guidance

This vulnerability is specific to Firefox and Firefox ESR versions prior to 156, 140.16, and 153.3. Detection involves checking installed versions of Firefox or Firefox ESR on systems. No direct network detection commands are provided in the CVE details.

Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your device. This could lead to data theft, installation of malware, or unauthorized system access if combined with other vulnerabilities.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. Without additional context on data exposure or processing implications, its effect on compliance cannot be determined.

Mitigation Strategies

Update Firefox to version 156 or later, Firefox ESR 140.16 or later, or Firefox ESR 153.3 or later to address the use-after-free vulnerability in the Audio/Video: Web Codecs component.

Hi! I’m here to help you understand CVE-2026-92005. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70