CVE WatchJul 15, 2026

CVE-2026-12297

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 14

CVSS

9.6

Critical

EPSS

0.4%

p33

KEV

—

Exploit Today

0-100

Published: Jun 16, 2026 · Last modified: Jul 15, 2026 · CWE-119 · CWE-653

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-242026-09-22

Technical description

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

Official references

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