[TESTING] Write security tests for injection vulnerabilities

[dev-fatima-24]

Priority: high

Description

API endpoints that accept wallet addresses and other inputs should be tested against injection payloads to verify they are handled safely.

Acceptance Criteria

• Test: SQL injection payload in wallet address returns 400 (not 500)
• Test: NoSQL injection payload in request body is rejected by validation
• Test: Oversized request body (>1MB) returns 413
• Test: Null byte in wallet address is rejected
• All injection tests result in 400 responses, not unhandled errors

[kingdavid0016]

@kingdavid0016 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi I'm a full stack developer I'll like to work on this issue because It picks my interest and Ive got experience with similar projects I'll have it solved in 24 hours or less

ℹ️ Repo Maintainers: To accept this application, review their application or assign @kingdavid0016 to this issue.

[Harbduls]

@Harbduls has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Please allow me to work on this issues
I can fix this dear maintainer
I am a smart contracts developer

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Harbduls to this issue.

[drips-wave]

Congratulations, @kingdavid0016! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @kingdavid0016: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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