VULNERABILITY INTELLIGENCE

CVE-2026-12296

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 in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-693
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-403

Primary references