In your Next.js app's Sentry setup, implement data minimization: (1) Add a beforeSend(event) hook that removes sensitive fields from events, e.g., if (event.user) { delete event.user.email; delete event.user.username; delete event.user.name; delete event.user.id; } (2) Ensure IP addresses are not sent by setting sendDefaultPii: false and removing event.ip or any IP fields from the event. (3) Remove or scrub any cookies or sensitive headers from event.request. (4) Implement explicit user consent or opt-out for telemetry and conditionally enable Sentry only after consent. (5) If possible, enable server-side privacy controls or a private telemetry endpoint to avoid sending data to third-party domains in production by default.

In your frontend Sentry integration, remove the sentry_key query parameter from the DSN and ensure the DSN is loaded from a secure environment variable. Do not hard-code or expose credentials in client code or network requests. Example fix: // In Next.js (client-side only) ensure SENTRY_DSN is provided from process.env and initialize Sentry with Sentry.init({ dsn: process.env.SENTRY_DSN, tracesSampleRate: 1.0 }); Ensure the build pipeline does not log full URLs or DSNs. If you must test ingestion, use a public DSN for the client and a separate private DSN only on server-side error reporting. Add a unit/integration test to verify that network calls do not include sentry_key in query strings and that the server never logs such sensitive parameters.

Review the frontend Sentry initialization to ensure no secret keys are exposed in the client. If the DSN is public, keep it as public DSN and remove any secret tokens from the URL. If a private key is used, implement error reporting via a backend proxy and remove the private key from client-side code. Rotate credentials if necessary. Enforce CORS restrictions and monitor for unexpected ingestion requests.