CVE-2026-113400
MediumCVSS 5.4Summary
An uninitialized memory vulnerability in the Audio/Video: cubeb component of Firefox and Thunderbird. The issue was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.
Risk Assessment
Could lead to memory disclosure or application instability during media playback. Updating is required to avoid potential exploitation.
Recommendation
Update Firefox and Thunderbird to version 158.0.1 or later.
Other vulnerabilities in Firefox and Thunderbird
See all- CVE-2026-113399Unknown
Incorrect boundary conditions in the SVG component. This vulnerability was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.
- CVE-2025-13013Medium
A mitigation bypass vulnerability exists in the DOM: Core & HTML component of Firefox and Thunderbird. It was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.
Original NVD description (English source)
Uninitialized memory in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS