CVE-2026-7321

CRITICAL

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

Title source: cna
STIX 2.1

Description

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, and Firefox ESR 140.10.1.

References (5)

Scores

CVSS v3 9.6
EPSS 0.0004
EPSS Percentile 11.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-120
Status published
Products (5)
Mozilla/Firefox 140.10.1
Mozilla/Firefox 140.10.1 - 140.*
Mozilla/Firefox 150
Mozilla/Thunderbird 140.10.1 - 140.*
Mozilla/Thunderbird 150
Published Apr 28, 2026
Tracked Since Apr 28, 2026