CVE-2026-92026
Received Received - Intake

Use-after-free in Firefox Networking Component

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-92026
EUVD
EUVD-2026-78489

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox 156
mozilla firefox_esr 140.16
mozilla firefox_esr 153.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in Firefox's Networking 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 a use-after-free in Firefox's Networking component, fixed in versions Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Detection requires checking installed Firefox versions and monitoring for crashes or unusual network behavior.

Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your system. This may allow them to steal data, install malware, or take control of your device.

Mitigation Strategies

Update Firefox to version 156 or later, Firefox ESR to version 140.16 or later, or Firefox ESR to version 153.3 or later to address the use-after-free vulnerability in the Networking component.

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