# CVE-2026-6783

> Vulnerability · severity: **MEDIUM** (CVSS 5.3).

## Description

Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

## Key facts

- **CVE ID:** CVE-2026-6783
- **Published:** 2026-04-21
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.3
- **CWE codes:** CWE-190

## Affected products

- `mozilla:firefox`
- `mozilla:thunderbird`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6783

## Citation

> AI Analytics. CVE-2026-6783. Retrieved 2026-07-09 from https://api.ai-analytics.org/cve/CVE-2026-6783. Derived from NIST NVD. Licensed CC0.

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