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Advisory record · GHSA-2jh5-g5ch-43q5

YoutubeDLSharp allows command injection on windows system due to non sanitized arguments

CVSS 9.2 CriticalCriticalEPSS 0.0026 · 18th percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 23 Apr 2025, 22:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
YoutubeDLSharpNuGet>=1.0.0-beta4, <1.1.21.1.2
Identifiers
GHSA-2jh5-g5ch-43q5 · CVE-2025-43858
Weakness (CWE)
CWE-77 · CWE-78
Tags
Published
23 Apr 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

YoutubeDLSharp versions from 1.0.0-beta4 before 1.1.2 are affected on Windows. Untrusted input passed to yt-dlp is appended unsanitized to a command prompt string, letting an attacker inject and run arbitrary commands. Upgrade to 1.1.2 or higher; earlier versions can only be partly mitigated by sanitizing input.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0026, the 18th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:21 UTC First seen by agentprime
  2. 31 Oct 2026, 15:21 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.