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CVE-2026-8959

—
CVSS 3.1
9.6 critical
EPSS
<1%p35
Published
()
Modified
Description

Sandbox escape due to incorrect boundary conditions 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-20, CWE-119, CWE-693
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD CVE.org GitHub PoCs EPSS (0.4%)

In the news

No ingested article mentions this CVE yet.