CVE-2026-71212 xidown - Argument Injection via Unterminated yt-dlp Command Line Construction
Attackers can execute arbitrary commands by injecting arguments into the yt-dlp invocation due to missing input validation and option terminators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-71212?
CVE-2026-71212 is a medium-severity command injection vulnerability in indravoyager xidown, published on 5 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
xidown (a yt-dlp/ffmpeg GUI wrapper) builds its yt-dlp command-line invocation (xidown/core/scanner.py and downloader.py) by appending the user-provided or scanned URL as a bare trailing positional argument, with no '--' end-of-options marker and no scheme validation anywhere in the codebase.
Weakness: CWE-88
Which versions are affected by CVE-2026-71212?
How do I fix CVE-2026-71212?
No fix has been published for CVE-2026-71212 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-71212 being exploited?
There is no known exploitation of CVE-2026-71212 in the wild and no public exploit code.
Sources
Also known as GHSA-f3j9-9qqv-p4r8, UBUNTU-CVE-2026-71212.