# CVE-2026-40962

> Vulnerability · severity: **MEDIUM** (CVSS 4.9).

## Description

FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.

## Key facts

- **CVE ID:** CVE-2026-40962
- **Published:** 2026-04-16
- **CVSS severity:** MEDIUM
- **CVSS base score:** 4.9
- **CWE codes:** CWE-190

## Affected products

- `ffmpeg:ffmpeg`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40962

## Citation

> AI Analytics. CVE-2026-40962. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-40962. Derived from NIST NVD. Licensed CC0.

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