CVE-2026-2792
Memory Corruption in Firefox and Thunderbird Enables Code Execution
Publication date: 2026-02-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.