CVE-2026-8949

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CVSS 3.1

7.5 high

EPSS

<1%p46

Published

May 19, 2026 (May 19, 2026)

Modified

Jun 17, 2026

Description

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Vendors: mozilla
Products: firefox, thunderbird
Weakness: CWE-190
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

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