CVE-2026-100759
Received Received - Intake

Memory Corruption in Firefox Storage Quota Manager

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Uninitialized memory in the Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100759
EUVD
EUVD-2026-88911

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 153.4
mozilla firefox 157
mozilla firefox 115.42
mozilla firefox 140.17

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 vulnerability involves uninitialized memory in the Storage: Quota Manager component of Firefox. Uninitialized memory means memory that has not been cleared or set to a default value before use, which can lead to unintended data exposure or crashes.

Impact Analysis

This vulnerability could allow attackers to read sensitive data from memory or cause unexpected behavior in the browser, such as crashes or incorrect data processing. Users of affected Firefox versions may be at risk of data leaks or system instability.

Mitigation Strategies

Update Firefox ESR to version 153.4 or later, Firefox to version 157 or later, Firefox ESR 115.42 or later, or Firefox ESR 140.17 or later to address the uninitialized memory issue in the Storage: Quota Manager component.

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