CVE-2026-16412
Received Received - Intake

Memory Corruption Flaws in Firefox ESR and Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. 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 153 and Firefox ESR 140.13.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-16412
EUVD
EUVD-2026-46250

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 140.12
mozilla firefox 152
mozilla firefox 140.13
mozilla firefox 153

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability involves memory safety bugs in Firefox ESR 140.12 and Firefox 152. These bugs can lead to memory corruption, which attackers might exploit to run arbitrary code on affected systems. The issue was resolved in Firefox 153 and Firefox ESR 140.13.

Detection Guidance

This vulnerability affects Firefox ESR 140.12 and Firefox 152. Check your Firefox version with about:support in the browser or run 'firefox --version' in the terminal. If you have versions 140.12 or 152 installed, update immediately to Firefox 153 or Firefox ESR 140.13.

Impact Analysis

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

Compliance Impact

This vulnerability involves memory safety bugs in Firefox ESR and Firefox that could lead to memory corruption and potential arbitrary code execution. Such vulnerabilities may compromise data confidentiality and integrity, which are critical for compliance with GDPR and HIPAA. However, the provided CVE data does not specify direct impacts on compliance standards.

Mitigation Strategies

Update Firefox to version 153 or Firefox ESR to version 140.13 or later to address the memory safety bugs and prevent potential exploitation.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-16412. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart