CVE-2026-6748: Vulnerability in Mozilla Firefox
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.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-6748 involves uninitialized memory usage within the Audio/Video: Web Codecs component of Mozilla Firefox. Uninitialized memory vulnerabilities can lead to unpredictable behavior, including potential information disclosure or memory corruption. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10 as part of a broader set of memory safety fixes. The vendor advisories from Mozilla confirm the high impact of this issue and the availability of patches in the specified Firefox versions.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisories. Uninitialized memory in the Web Codecs component could lead to memory safety issues, which may be exploitable to cause information disclosure or other memory corruption effects. However, there are no known exploits in the wild at the time of publication. The issue affects Firefox versions prior to 150 and ESR versions prior to 140.10.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these versions or later to remediate the vulnerability. Since this is a client software vulnerability, applying the official update is the recommended and effective mitigation. No additional vendor-recommended mitigations or workarounds are indicated.
CVE-2026-6748: Vulnerability in Mozilla Firefox
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-6748 involves uninitialized memory usage within the Audio/Video: Web Codecs component of Mozilla Firefox. Uninitialized memory vulnerabilities can lead to unpredictable behavior, including potential information disclosure or memory corruption. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10 as part of a broader set of memory safety fixes. The vendor advisories from Mozilla confirm the high impact of this issue and the availability of patches in the specified Firefox versions.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisories. Uninitialized memory in the Web Codecs component could lead to memory safety issues, which may be exploitable to cause information disclosure or other memory corruption effects. However, there are no known exploits in the wild at the time of publication. The issue affects Firefox versions prior to 150 and ESR versions prior to 140.10.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these versions or later to remediate the vulnerability. Since this is a client software vulnerability, applying the official update is the recommended and effective mitigation. No additional vendor-recommended mitigations or workarounds are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:40:45.603Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-32/","vendor":"Mozilla"}]
Threat ID: 69e7789819fe3cd2cdd1624c
Added to database: 4/21/2026, 1:16:08 PM
Last enriched: 4/21/2026, 1:47:33 PM
Last updated: 4/22/2026, 6:04:56 AM
Views: 5
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