CVE-2026-4687

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CVSS 3.1

8.6 high

EPSS

<1%p44

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jul 15, 2026

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.

Vendors: mozilla
Products: firefox
Weakness: CWE-754, CWE-120, CWE-501
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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