CVE-2026-16361
Received Received - Intake

Memory Corruption in Firefox ESR

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox ESR 115.37 and Firefox ESR 140.12. 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 ESR 115.38 and Firefox ESR 140.13.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2026-16361
EUVD
EUVD-2026-46252

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
mozilla firefox_esr to 115.38 (exc)
mozilla firefox_esr to 140.13 (exc)
mozilla firefox_esr 115.38
mozilla firefox_esr 140.13
mozilla firefox_esr 115.37
mozilla firefox_esr 140.12

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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 in Firefox ESR versions 115.37 and 140.12. These bugs could lead to memory corruption, and attackers might exploit them to execute arbitrary code if sufficient effort is applied.

Detection Guidance

This vulnerability affects Firefox ESR versions before 115.38 and 140.13. To detect it, check your installed Firefox ESR version using commands like 'firefox --version' or 'apt list --installed | grep firefox-esr' on Debian-based systems. Compare the version against 115.38 or 140.13.

Impact Analysis

If exploited, this vulnerability could allow attackers to run malicious code on your system, potentially leading to data theft, system compromise, or unauthorized access. Users running affected Firefox ESR versions should update immediately.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves memory safety issues in Firefox ESR that could allow arbitrary code execution, which may lead to data breaches or unauthorized access if exploited. Such incidents could potentially violate GDPR or HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Update Firefox ESR to version 115.38 or later and Firefox ESR 140.13 or later to address the memory safety bugs and prevent potential arbitrary code execution.

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