Vulnerability Description
YoutubeDLSharp is a wrapper for the command-line video downloaders youtube-dl and yt-dlp. In versions starting from 1.0.0-beta4 and prior to 1.1.2, an unsafe conversion of arguments allows the injection of a malicious commands when starting `yt-dlp` from a commands prompt running on Windows OS with the `UseWindowsEncodingWorkaround` value defined to true (default behavior). If a user is using built-in methods from the YoutubeDL.cs file, the value is true by default and a user cannot disable it from these methods. This issue has been patched in version 1.1.2.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/Bluegrams/YoutubeDLSharp/commit/b6051372bd5af30f95f73de47d9bc
- https://github.com/Bluegrams/YoutubeDLSharp/commit/fdf3256da18d0e2da4a2f33ad4a1b
- https://github.com/Bluegrams/YoutubeDLSharp/security/advisories/GHSA-2jh5-g5ch-4
- https://github.com/Bluegrams/YoutubeDLSharp/security/advisories/GHSA-2jh5-g5ch-4
FAQ
What is CVE-2025-43858?
CVE-2025-43858 is a vulnerability with a CVSS score of 9.2 (CRITICAL). YoutubeDLSharp is a wrapper for the command-line video downloaders youtube-dl and yt-dlp. In versions starting from 1.0.0-beta4 and prior to 1.1.2, an unsafe conversion of arguments allows the injecti...
How severe is CVE-2025-43858?
CVE-2025-43858 has been rated CRITICAL with a CVSS base score of 9.2/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-43858?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.