## YouTube Embed Vulnerability: Video IDs Not Sanitized, Opening Path to URL Injection
A low-risk but notable security flaw has been identified in a video utility module, where YouTube video IDs are not sanitized before being interpolated into embed URLs. The vulnerability, classified as URL injection, stems from the direct use of regex-extracted IDs without proper format validation. This creates a potential, albeit limited, injection vector within the confines of YouTube's own domain.

The issue is located in `src/utils/video.ts` (lines 38–49). The code extracts video IDs from both `youtu.be` short links and `youtube.com` full URLs using regex patterns that match any character except `&` and `#`. For the `youtu.be` path, a simple split operation is used. The extracted `videoId` is then directly inserted into the embed URL template: `https://www.youtube.com/embed/{videoId}`. This lack of sanitization means a crafted ID could theoretically include characters like `/` or `..`, attempting path traversal.

While the risk is assessed as low because the domain is hardcoded to `youtube.com`, confining any malicious iframe to YouTube's servers, the absence of validation is a security oversight. It signals a potential weakness in input handling that, while not directly exploitable for cross-domain attacks, could be leveraged for unexpected behavior within YouTube's ecosystem. The core exposure is the failure to enforce a strict format for the video ID before embedding.
---
- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: security, vulnerability, YouTube, code review, URL injection
- **Credibility**: unverified
- **Published**: 2026-04-05 18:26:55
- **ID**: 50703
- **URL**: https://whisperx.ai/en/intel/50703