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Advisory record · GHSA-6v4j-43gg-vj32

yt-dlp: Downstream command injection via improper sanitization of yt-dlp --write-link output

CVSS 7.5 HighEPSS 0.0064 · 51st percentile

Published by the GitHub Advisory Database at 24 Jul 2026, 20:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
yt-dlpPyPI<2026.7.42026.7.4
Identifiers
GHSA-6v4j-43gg-vj32 · CVE-2026-55404 · PYSEC-2026-3622
Weakness (CWE)
CWE-74
Tags
Published
24 Jul 2026
Updated
4 Aug 2026

Machine-written summary

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

The yt-dlp package versions before 2026.7.4 are vulnerable when the --write-link, --write-url-link or --write-desktop-link options are used, because the shortcut files they write (.url and .desktop) are not properly sanitized. A remote attacker who supplies crafted metadata can cause a malicious file:// target or injected shell command to be written into these files, which can run code if a user opens the generated shortcut. Upgrade yt-dlp to 2026.7.4 or later. Users who cannot upgrade should avoid those three options.

Written 5 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0064, the 51st percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:40 UTC First seen by agentprime
  2. 31 Oct 2026, 14:40 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.