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CVE-2026-71212 indravoyager CVE debrief

The CVE-2026-71212 vulnerability is a MEDIUM-severity issue in xidown, a GUI wrapper for yt-dlp and ffmpeg. The vulnerability arises from improper handling of user-provided URLs, allowing potential code execution via crafted inputs. This occurs because xidown constructs its yt-dlp command-line invocation by appending user-provided or scanned URLs as bare trailing positional arguments, lacking a '--' end-of-options marker and URL scheme validation. As a result, yt-dlp interprets arguments starting with '-' as CLI options rather than link text. A crafted 'URL' value, such as '-U' (yt-dlp's self-update flag) or '--exec=...', can alter the tool's control flow before its own URL validation runs. While full code execution via '--exec' was not demonstrated in the single-URL flow tested, the underlying argument-injection primitive is confirmed and unmitigated across all call sites. Users and administrators should review and validate user input for URLs in xidown, implement proper URL scheme validation and sanitization, and consider using the '--' end-of-options marker in yt-dlp command-line invocations. Monitoring for potential exploitation attempts is also advised. Limited details are available about affected products and vendor remediation. The CVE record was published on 2026-08-05T08:16:43.503Z and has not been modified since then.

Vendor
indravoyager
Product
xidown
CVSS
MEDIUM 4.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-05
Original CVE updated
2026-08-05
Advisory published
2026-08-05
Advisory updated
2026-08-05

Who should care

Users and administrators of xidown, yt-dlp, and ffmpeg should be aware of this vulnerability. Developers of GUI wrappers for command-line tools should review their implementations for similar vulnerabilities. Security teams should monitor for potential exploitation attempts. Additionally, operators of affected platforms, vulnerability management teams, and security teams responsible for patching and mitigating vulnerabilities should prioritize this issue and plan for remediation. Inventory and patch vulnerable xidown installations, and consider compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

The xidown application, a GUI wrapper for yt-dlp and ffmpeg, constructs its yt-dlp command-line invocation by appending user-provided or scanned URLs as bare trailing positional arguments. This approach lacks a '--' end-of-options marker and does not perform scheme validation on the URLs. As a result, yt-dlp interprets arguments starting with '-' as CLI options rather than link text. A crafted 'URL' value, such as '-U' (yt-dlp's self-update flag) or '--exec=...', can be parsed as a real yt-dlp option instead of a URL. This alters the tool's control flow before its own URL validation runs. While full code execution via '--exec' was not demonstrated in the single-URL flow tested, the underlying argument-injection primitive is confirmed and unmitigated across all call sites.

Defensive priority

Medium-severity vulnerability in xidown, a yt-dlp/ffmpeg GUI wrapper, allowing for potential code execution via crafted URL inputs.

Recommended defensive actions

  • Review and validate user input for URLs in xidown
  • Implement proper URL scheme validation and sanitization
  • Consider using '--' end-of-options marker in yt-dlp command-line invocations
  • Monitor for potential exploitation attempts
  • Inventory and patch vulnerable xidown installations

Evidence notes

The CVE record indicates a MEDIUM-severity vulnerability in xidown, a yt-dlp/ffmpeg GUI wrapper. The vulnerability is due to improper handling of user-provided URLs, allowing for potential code execution via crafted inputs. The CVE record was published on 2026-08-05T08:16:43.503Z and has not been modified since then. Limited details are available about affected products and vendor remediation.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T08:16:43.503Z and has not been modified since then.