## Critical Security Gap: Next.js Healthcare App Lacks Mandatory Content-Security-Policy
A critical security vulnerability has been identified in a Next.js web application, exposing it to significant risk. The application, which appears to be in the healthcare sector, is currently deployed without any Content-Security-Policy (CSP) headers. This absence is a major security lapse, as CSP is a mandatory defense-in-depth control for applications handling sensitive data. Without it, any existing or future Cross-Site Scripting (XSS) vulnerability could be exploited to execute arbitrary malicious scripts, steal authentication tokens from cookies, or exfiltrate sensitive patient information directly from the browser.

The issue is documented in a GitHub repository under the branch `feat/csp-headers-nextjs`, with a one-day timeframe for resolution. The core problem is the missing `headers()` function in the `apps/web/next.config.js` configuration file. This function is required to set critical security headers on all application routes. The lack of CSP means the application has no policy to restrict where resources like scripts, styles, and images can be loaded from, leaving it wide open to injection attacks.

The required fix is comprehensive. Developers must implement the `headers()` function to set not only a strict `Content-Security-Policy` (with directives like `default-src 'self'` and `script-src 'self'`) but also other essential headers: `X-Frame-Options: DENY` to prevent clickjacking via iframe embedding, `X-Content-Type-Options: nosniff` to stop MIME-type sniffing, and policies for referrers and permissions. Acceptance criteria mandate that a `curl -I` command against the local server must show the CSP header, the browser console must be free of CSP violations during normal use, and the `X-Frame-Options` must be verified. Proof of implementation, via a screenshot or screen recording, is required for the pull request, highlighting the operational pressure to close this security gap immediately.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, healthtech, web-development, data-breach-risk
- **Credibility**: unverified
- **Published**: 2026-03-25 09:27:12
- **ID**: 32920
- **URL**: https://whisperx.ai/en/intel/32920