CVE-2026-109744
Deferred Deferred - Pending Action

DOM File Component Use-After-Free in Firefox

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Other issue in the DOM: File component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-19
AI Q&A
2026-10-13
EPSS Evaluated
2026-10-18
NVD
CVE-2026-109744
EUVD
EUVD-2026-98506

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 158 (inc)
mozilla firefox_esr to 153.5 (inc)

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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 vulnerability is a DOM-related issue in the File component of Firefox and Firefox ESR. It was patched in Firefox version 158 and Firefox ESR version 153.5. The exact technical details are not provided in the given context.

Detection Guidance

This vulnerability affects Firefox versions before 158 and Firefox ESR before 153.5. To detect it, check your installed Firefox version with: firefox --version. If it is below 158 or ESR below 153.5, the system is vulnerable.

Impact Analysis

The vulnerability could potentially allow attackers to manipulate file-related operations in the browser, leading to unauthorized access or data leakage. Users of affected Firefox versions may be at risk until they update to the fixed versions.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions a DOM File component issue fixed in Firefox 158 and Firefox ESR 153.5 without details on data exposure or regulatory impacts.

Mitigation Strategies

Update Firefox to version 158 or later and Firefox ESR to version 153.5 or later to address the DOM File component vulnerability.

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