CVE-2026-2792
Received Received - Intake
Memory Corruption in Firefox and Thunderbird Enables Code Execution

Publication date: 2026-02-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, 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, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
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Meta Information
Published
2026-02-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2792
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)
mozilla thunderbird to 140.8.0 (exc)
mozilla firefox to 140.8.0 (exc)
Helpful Resources
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 specific versions of Mozilla Firefox and Thunderbird, including Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147, and Thunderbird 147.

Some of these bugs showed evidence of memory corruption, which means that the software's memory could be improperly accessed or modified.

With enough effort, these bugs could potentially be exploited to run arbitrary code, meaning an attacker could execute malicious code on the affected system.

This vulnerability affects Firefox versions earlier than 148 and Firefox ESR versions earlier than 140.8.

Impact Analysis

Exploitation of this vulnerability could allow an attacker to execute arbitrary code on your system.

This means that an attacker might gain control over your browser or email client, potentially leading to unauthorized access to your data or system.

Such an impact could compromise your privacy, security, and the integrity of your system.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, update affected Mozilla products to the fixed versions. Specifically, upgrade Firefox to version 148 or later, and Firefox ESR to version 140.8 or later. Similarly, update Thunderbird to version 148 or later, and Thunderbird ESR to version 140.8 or later.

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