UpHeron
All vulnerabilities

Servers and applications

CVE-2019-9721

A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

Severity
Medium 6.5
Published
12 Mar 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.4% in the next 30 daysHigher than 73% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
FFmpegServers and applications · cpe:a:ffmpeg:ffmpeg
  • Version 3.2
  • Version 4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-9721
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-9721