CVE-2026-4717

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CVSS 3.1

9.8 critical

EPSS

<1%p35

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jun 17, 2026

Description

Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Vendors: mozilla
Products: firefox
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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