CVE-2026-109706
Deferred Deferred - Pending Action

Use-after-free in Firefox IndexedDB

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, 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-2026-109706
EUVD
EUVD-2026-98635

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
mozilla firefox to 158 (inc)
mozilla firefox_esr to 115.43 (inc)
mozilla firefox_esr to 153.5 (inc)
mozilla firefox 158
mozilla firefox_esr 115.43
mozilla firefox_esr 153.5

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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Executive Summary

CVE-2026-109706 is a use-after-free vulnerability in Firefox's Storage: IndexedDB component. This occurs when the program tries to access memory that has already been freed, which can lead to crashes, data corruption, or arbitrary code execution.

Detection Guidance

Detection primarily involves checking Firefox ESR version. Run 'firefox --version' or check 'about:support' in Firefox to verify if your version is below ESR 115.43 or 153.5.

Impact Analysis

This vulnerability could allow attackers to execute arbitrary code, corrupt data, or cause application crashes by exploiting the use-after-free issue in Firefox's IndexedDB storage.

Compliance Impact

This vulnerability could potentially lead to data corruption or unauthorized access, which may impact compliance with GDPR or HIPAA if sensitive data is involved. However, the provided text does not specify direct compliance implications.

Mitigation Strategies

Update Firefox ESR to version 115.43 or later, or Firefox ESR 153.5 or later. Disable IndexedDB if not needed via Firefox configuration settings.

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