🚨 Flash: [CRITICAL] Fix x-forwarded-for parsing injection vulnerability

[Shreyassp002]

Category: Security
Priority: P0

💡 What:
x-forwarded-for header values were passed directly into Supabase insert operations without sanitization or .trim().

🎯 Why:
Proxy chains can prepend multiple IPs or inject spaces in the x-forwarded-for header. Passing this unsanitized directly to database queries could trigger DoS via massive insertion limits or injection vulnerabilities.

📊 Impact:
Prevents potential DoS issues related to Database insertion limits when malicious x-forwarded-for headers are provided.

✅ Verification:
Run npm run lint and npm run build.

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PR created automatically by Jules for task 2813170668457249534 started by @Shreyassp002

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Project	Deployment	Actions	Updated (UTC)
flash-protocol	Ready	Preview, Comment	Apr 6, 2026 6:01am

[github-actions]

⚡ Flash Review

Metric	Value
Files Reviewed	1
Risk Level	🟡 Medium
Issues Found	🚨 0 Critical · ⚠️ 1 Warnings · 💡 0 Suggestions

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⚠️ Warnings (should fix)

• src/providers.tsx:L17 — Defaulting projectId to a generic string 'fallback-id' will cause WalletConnect to fail, preventing wallet connections.

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✅ What's good: Appreciate the prompt action on addressing a critical x-forwarded-for parsing injection vulnerability, demonstrating a strong commitment to security.

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[github-actions]

⚡ Flash Review

🐛 Bug: Defaulting projectId to a generic string 'fallback-id' if NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID is not set will likely cause WalletConnect to fail during initialization, preventing users from connecting their wallets. WalletConnect requires a valid project ID.

Fix: Ensure NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID is always configured in production. For development, consider throwing an explicit error if it's missing, or use a specific test ID provided by WalletConnect, rather than a generic string that will cause runtime failures.