CVE-2026-6781

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-6781
Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2025583 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-30/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-33/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

22 Apr 2026, 15:09

Type Values Removed Values Added
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2025583 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2025583 - 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

22 Apr 2026, 00:16

Type Values Removed Values Added
Summary (en) Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150. (en) Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-33/ -

21 Apr 2026, 18:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
CWE CWE-400

21 Apr 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-21 13:16

Updated : 2026-04-22 15:09

NVD link : CVE-2026-6781

Mitre link : CVE-2026-6781

CVE.ORG link : CVE-2026-6781

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-400

Uncontrolled Resource Consumption