CVE-2026-8091

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-8091
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2029301 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-30/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-33/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-36/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-39/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-42/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
History

11 May 2026, 15:20

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2029301 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2029301 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-30/ - () https://www.mozilla.org/security/advisories/mfsa2026-30/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-33/ - () https://www.mozilla.org/security/advisories/mfsa2026-33/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-36/ - () https://www.mozilla.org/security/advisories/mfsa2026-36/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-39/ - () https://www.mozilla.org/security/advisories/mfsa2026-39/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-42/ - () https://www.mozilla.org/security/advisories/mfsa2026-42/ - Vendor Advisory
First Time Mozilla thunderbird
Mozilla
Mozilla firefox
CWE NVD-CWE-noinfo
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*

08 May 2026, 23:16

Type Values Removed Values Added
CWE CWE-754
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

07 May 2026, 16:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-07 13:16

Updated : 2026-05-11 15:20

NVD link : CVE-2026-8091

Mitre link : CVE-2026-8091

CVE.ORG link : CVE-2026-8091

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
NVD-CWE-noinfo CWE-754

Improper Check for Unusual or Exceptional Conditions