What is CVE-2026-66041?

CVE-2026-66041 is a high-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-07-24.

How severe is CVE-2026-66041?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Ffmpeg

CVE-2026-66041

FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame d…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ffmpeg — versions 7.0, 4da9812e25894fb51d62a8875cfa8eb39b5e20f5

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66041?: CVE-2026-66041 is a high-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-07-24.
How severe is CVE-2026-66041?: High severity. CVSS v3 base score is 8.8 out of 10.