CVE-2026-12297

CriticalCVSS 9.6/10Last modified Jul 15, 2026

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.

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-119CWE-653

Affected software

No affected versions have been published.

Timeline

Published
Jun 16, 2026
Last modified
Jul 15, 2026
NVD status
Modified

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CVE-2026-12297: Critical severity, CVSS 9.6 | Vulnix