CVE-2026-6748 Details
Description
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
A vulnerability has been identified in the Audio/Video: Web Codecs component of Mozilla Firefox and Firefox ESR. This issue stems from uninitialized memory, which can lead to potential memory corruption. The vulnerability is present in Firefox versions prior to 150 and in Firefox ESR versions prior to 140.10.
Users can upgrade to Firefox 150 or Firefox ESR 140.10 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 21, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-457 | Use of Uninitialized Variable | CISA-ADP |
| CWE-824 | Access of Uninitialized Pointer | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 140.10.0 < 150.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 140.10.0 |
CPE
Remediation
| |
Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | CVE Modified | [email protected] |
| Apr 21, 2026 | CVE Modified | CISA-ADP |
| Apr 21, 2026 | New CVE Received | [email protected] |