# Stellar Core Protocol 23 Changes security audit

Stellar is an open network for fast, low-cost payments and asset issuance; this audit covered the Protocol 23 changes to stellar-core and the Soroban host environment, including the overlay, crypto, SCP and transactions modules.

Codezen audited Stellar Core Protocol 23 Changes together with Oak Security. Technologies in scope: C++, C, Soroban, Rust and Stellar. We reported 81 findings: 2 critical, 1 major, 35 minor and 43 informational.

- Audit type: Blockchain node audit
- Technologies: C++, C, Soroban, Rust, Stellar
- Ecosystem: Stellar
- Delivered with: Oak Security
- Report date: 17 October 2025
- Full report (PDF): https://github.com/oak-security/audit-reports/blob/8a29e1d31c20fdc68bc732b1db73c4660d3fa507/Stellar/2025-10-17%20Audit%20Report%20-%20Stellar%20Core%20Protocol%2023%20Changes%20v1.0.pdf
- Project website: https://stellar.org
- Page: https://www.codezen.tech/audits/stellar-core-protocol-23/

## Findings by severity

| Severity | Count |
| --- | --- |
| Critical | 2 |
| Major | 1 |
| Minor | 35 |
| Info | 43 |
| Total | 81 |

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