CVE-2026-40962
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
ProductFfmpeg
PublishedApr 16, 2026
First seenApr 16, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- ffmpeg ffmpeg8.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ffmpeg ffmpeg | v < 8.1 | 8.1 |
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