CVE-2026-40962

9.8 criticalEPSS 0.1%

Critical (9.8) in ffmpeg ffmpeg. EPSS 0.1% 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.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2026-04-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19