[Security] Input sanitization audit

[GoSTEAN]

Description

Audit all user inputs for injection and validation issues.

Acceptance Criteria

• Verify SQL injection protection (Prisma parameterization)
• Sanitize market title/description for XSS
• Validate all numeric inputs (no negatives, overflow protection)
• Validate all addresses are valid Stellar format

Priority

🟠 P1 — High

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 200 Points.

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[Jonniie]

@Jonniie has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hi, I would love to work on this

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

[henrypeters]

@henrypeters has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hi, I would love to work on this issue

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

[Haroldwonder]

@Haroldwonder has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I would like to work on this

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

[drips-wave]

Congratulations, @Haroldwonder! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

🧑‍💻 @Haroldwonder: 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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