CVE-2026-12326
Received Received - Intake
Memory Corruption in Firefox and Thunderbird

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox 151 and Thunderbird 151. 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 152.
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Meta Information
Published
2026-06-16
Last Modified
2026-06-16
Generated
2026-06-16
AI Q&A
2026-06-16
EPSS Evaluated
N/A
NVD
CVE-2026-12326
EUVD
EUVD-2026-37072
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 152 (exc)
mozilla thunderbird 151
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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 involves memory safety bugs found in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption, which means that the program's memory could be improperly accessed or modified. It is presumed that with enough effort, these bugs could have been exploited to run arbitrary code, potentially allowing an attacker to execute malicious actions on the affected system. The issue was fixed in Firefox 152.

Impact Analysis

The vulnerability could allow an attacker to exploit memory corruption bugs to run arbitrary code on your system through Firefox 151 or Thunderbird 151. This could lead to unauthorized actions such as installing malware, stealing data, or taking control of your device. Using updated versions like Firefox 152 mitigates this risk.

Mitigation Strategies

The vulnerability was fixed in Firefox 152. To mitigate this vulnerability, you should update your Firefox and Thunderbird installations to version 152 or later.

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