Critical severity9.2OSV Advisory· Published Apr 24, 2025· Updated Apr 15, 2026
CVE-2025-43858
CVE-2025-43858
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
YoutubeDLSharpNuGet | >= 1.0.0-beta4, < 1.1.2 | 1.1.2 |
Affected products
2- Range: v.1.0.0, v.1.1.0
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-2jh5-g5ch-43q5ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-43858ghsaADVISORY
- github.com/Bluegrams/YoutubeDLSharp/commit/b6051372bd5af30f95f73de47d9bc71c3a07de0fnvdWEB
- github.com/Bluegrams/YoutubeDLSharp/commit/fdf3256da18d0e2da4a2f33ad4a1b72ff8273a50nvdWEB
- github.com/Bluegrams/YoutubeDLSharp/security/advisories/GHSA-2jh5-g5ch-43q5nvdWEB
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