CVE-2026-40962

Name: CVE-2026-40962
Creator: NVD / NIST
Published: 2026-04-16T02:16:12.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.13%

Last modified Jun 17, 2026

CVE-2026-40962 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.13%

3.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	< 8.1

References

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22348Issue Tracking, Patch

Timeline

Published: Apr 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-40962?

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

How severe is CVE-2026-40962?

CVE-2026-40962 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40962?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40962?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST