CVE-2026-2807
Modified Modified - Updated After Analysis

Memory Corruption in Firefox & Thunderbird <148 Enables Code Execution

Publication date: 2026-02-24

Last updated on: 2026-06-30

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

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Meta Information

Published
2026-02-24
Last Modified
2026-06-30
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-04
NVD
CVE-2026-2807

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability involves memory safety bugs found in Firefox 147 and Thunderbird 147. Some of these bugs showed signs of memory corruption, which means that with enough effort, an attacker could potentially exploit them to execute arbitrary code on the affected systems.

Impact Analysis

The impact of this vulnerability could be severe because it may allow an attacker to run arbitrary code on your system. This could lead to unauthorized access, data theft, or other malicious activities depending on what the attacker executes.

Compliance Impact

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Detection Guidance

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