CVE-2026-117878
Received Received - Intake

Use-After-Free in Firefox Storage IndexedDB

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117878
EUVD
EUVD-2026-111049

Affected Vendors & Products

Currently, no data is known.

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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 the Storage: IndexedDB component of Firefox. 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

Detection requires checking Firefox version. Run 'firefox --version' in terminal. If version is below 159 (standard) or 115.44/153.6 (ESR), the system is vulnerable.

Impact Analysis

An attacker could exploit this to crash the browser or run malicious code on your system. It may allow unauthorized access to data stored in IndexedDB or enable further attacks on your device.

Mitigation Strategies

Update Firefox to version 159 or higher, or Firefox ESR to 115.44 or 153.6 or later. Disable IndexedDB if not needed via about:config settings.

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