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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-6748

Uninitialized memory in the Audio/Video: Web Codecs component

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 140.10 to ≤ 140.*unaffected
  • 150 to ≤ *unaffected

Mozilla Thunderbird

  • 140.10 to ≤ 140.*unaffected
  • 150 to ≤ *unaffected

References