CVE-2026-8948

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

19/05/2026

Last modified:

15/07/2026

Description

Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 9.10 CRITICAL
Vector: 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 (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

9.10

Severity 3.x

CRITICAL

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox:::::-:::*		151.0.0 (excluding)
cpe:2.3:a:mozilla:thunderbird::::::::		151.0.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-8948

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools