VULNERABILITY INTELLIGENCE

CVE-2026-4690

CVSS score8.6 HIGH
EPSS probability0.80%
CISA KEVNot currently listed
Published2026-03-24
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Description

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Weakness classification

  • nvd@nist.gov: CWE-190
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-120
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-190

Primary references