CVE-2026-12306
Received Received - Intake
Memory Corruption Vulnerability in Firefox

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

Description
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
CVSS Scores
EPSS Scores
Probability:
Percentile:
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-2026-12306
EUVD
EUVD-2026-37097
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox 152
mozilla firefox_esr 140.12
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 is a memory safety bug that was present in Mozilla Firefox. It was addressed and fixed in Firefox version 152 and Firefox ESR 140.12.

Mitigation Strategies

To mitigate this vulnerability, update your Firefox browser to version 152 or later, or Firefox ESR to version 140.12 or later, where the memory safety bug has been fixed.

Impact Analysis

This vulnerability is a memory safety bug in Firefox that was fixed in Firefox 152 and Firefox ESR 140.12.

Memory safety bugs can potentially lead to crashes, data corruption, or exploitation by attackers to execute arbitrary code or cause denial of service.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-12306. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart