What is CVE-2026-58049?

CVE-2026-58049 is a high-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2026-06-28.

How severe is CVE-2026-58049?

High severity. CVSS v3 base score is 8.6 out of 10.

Buffer overflow in Ffmpeg

CVE-2026-58049

FFmpeg's RASC video decoder (decode_dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT_LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Ffmpeg — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (exploit, third-party-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-58049?: CVE-2026-58049 is a high-severity vulnerability in Ffmpeg, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2026-06-28.
How severe is CVE-2026-58049?: High severity. CVSS v3 base score is 8.6 out of 10.