CVE WatchJul 15, 2026

CVE-2026-12326

Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that w

CVSS

8.1

High

EPSS

0.3%

p16

KEV

—

Exploit Today

0-100

Published: Jun 16, 2026 · Last modified: Jul 15, 2026 · CWE-119 · CWE-825

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-06-302026-07-20

Technical description

Memory safety bugs present in Firefox 151 and Thunderbird 151. 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 152 and Thunderbird 152.

Official references

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