VULNERABILITY INTELLIGENCE

CVE-2026-4687

CVSS score8.6 HIGH
EPSS probability0.56%
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 in the Telemetry 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-754
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-120
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-501

Primary references