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CVE-2026-4689

—
CVSS 3.1
10.0 critical
EPSS
<1%p50
Published
()
Modified
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, thunderbird
Weakness
CWE-190, CWE-754, CWE-120
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD CVE.org GitHub PoCs EPSS (0.7%)

In the news

No ingested article mentions this CVE yet.