EUVD Vulnerability Catalog

EUVD-2026-98516

Severity: CRITICAL Base Score: 9.6 CVSS Version: 3.1

Vulnerability Description

Sandbox escape in the DOM: Content Processes component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Privileges Required (PR): None

▪ User Interaction (UI): Required

▪ Scope (S): Changed

▪ Confidentiality Impact (C): High

▪ Integrity Impact (I): High

▪ Availability Impact (A): High

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

mozilla

EPSS Probability

0.19

Known Aliases

CVE-2026-109755 GHSA-qcgq-q223-7x4r

Published On

2026-10-13

Last Updated

2026-10-15