CVE-2026-4690

—

CVSS 3.1

8.6 high

EPSS

<1%p54

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jul 15, 2026

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.

Vendors: mozilla
Products: firefox
Weakness: CWE-190, CWE-754, CWE-120
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 (0.8%)

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