VULNERABILITY INTELLIGENCE

CVE-2026-12297

CVSS score9.6 CRITICAL
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-06-16
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-119
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-653

Primary references