EUVD Vulnerability Catalog

EUVD-2026-98532

Severity: CRITICAL Base Score: 9.1 CVSS Version: 3.1

Vulnerability Description

Same-origin policy bypass in the DevTools 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:N/S:U/C:H/I:H/A:N

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Privileges Required (PR): None

▪ User Interaction (UI): None

▪ Scope (S): Unchanged

▪ Confidentiality Impact (C): High

▪ Integrity Impact (I): High

▪ Availability Impact (A): None

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

mozilla

EPSS Probability

0.16

Known Aliases

GHSA-ggf3-jcg3-q9f8 CVE-2026-109772

Published On

2026-10-13

Last Updated

2026-10-26