[Mihir-Rabari]

🚨 Severity: HIGH
💡 Vulnerability: The internal secret validation in codexRoutes.ts used a standard equality operator (!==), which is susceptible to timing attacks. This could allow an attacker to guess the internal secret character by character by measuring response times.
🎯 Impact: If the internal service secret is compromised, an attacker could bypass internal authentication and access sensitive endpoints intended only for internal microservices, such as retrieving Codex access tokens.
🔧 Fix: Updated the secret comparison to use crypto.timingSafeEqual, ensuring both buffers are of equal length and compared securely.
✅ Verification: Ran unit tests and workspace tests successfully.

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PR created automatically by Jules for task 862679993209076397 started by @Mihir-Rabari

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