CVE-2026-92023
Received Received - Intake

Use-after-free in Firefox XML Component

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Use-after-free in the XML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, 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-2026-92023
EUVD
EUVD-2026-78486

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
mozilla firefox to 156 (inc)
mozilla firefox_esr to 115.41 (inc)
mozilla firefox_esr to 140.16 (inc)
mozilla firefox_esr to 153.3 (inc)
mozilla firefox 156
mozilla firefox_esr 115.41
mozilla firefox_esr 140.16
mozilla firefox_esr 153.3

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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 XML component. Use-after-free means an attacker can exploit a flaw where a program continues to use memory after it has been freed, potentially leading to arbitrary code execution or crashes.

Detection Guidance

Detection of CVE-2026-92023 requires checking Firefox versions. The vulnerability affects Firefox versions before 156 and Firefox ESR versions before 115.41, 140.16, and 153.3. Use commands like 'firefox --version' or 'firefox-esr --version' to check installed versions.

Impact Analysis

An attacker could exploit this to execute malicious code on your system, steal data, or cause Firefox to crash. It primarily affects users running vulnerable versions of Firefox or Firefox ESR.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The vulnerability involves a use-after-free in the XML component of Firefox, but no direct implications for regulatory compliance are mentioned.

Mitigation Strategies

Update Firefox to version 156 or later, Firefox ESR to version 115.41 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 XML component.

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