CVE-2026-8091

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

07/05/2026

Last modified:

11/05/2026

Description

Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.

Impact

Vector 3.x

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

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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): High

Base Score 3.x

9.80

Severity 3.x

CRITICAL

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox:::::esr:::*		115.35.2 (excluding)
cpe:2.3:a:mozilla:firefox:::::esr:::*	140.0 (including)	140.10.1 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::-:::*	140.0 (including)	140.10.1 (excluding)

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

CVE-2026-8091

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools