CVE-2026-40962: Ffmpeg

Critical severity, CVSS 9.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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

Affected products

• Ffmpeg Ffmpeg: before 8.1 (fixed in 8.1)

Published 2026-04-16. Last modified 2026-06-17.