Ripple has completed a comprehensive re-audit of the XRP Ledger (XRPL) Lending Protocol, with security firm Halborn confirming that all findings from previous reviews have been resolved. The audit, conducted between mid-December 2025 and January 2026, focused on code modifications made since the protocol's summer audit, validating the implementation against the XLS-0066d standard.
Re-Audit Scope and Methodology
Halborn performed a diff-based re-audit targeting significant codebase changes, examining transaction validation logic, state consistency, parameter checks, and access controls. The firm used a layered approach combining specification reviews, code-diff analysis, manual inspection, and automated static analysis to evaluate XRPL's three-stage transaction processing model.
Findings and Resolutions
The re-audit reported zero critical or high-severity vulnerabilities. Halborn identified five findings, all addressed or accepted by Ripple. One issue involved a missing validation check that could have allowed a vault's total assets to exceed its configured maximum through loan interest accumulation; Ripple noted its engineering team had already fixed this internally before the audit. Another finding showed users could create a LoanBroker on a frozen vault, wasting reserves; Ripple added a freeze check to the preclaim stage.
With all findings resolved, the XRPL Lending Protocol, a DeFi primitive enabling fixed-term, uncollateralized on-chain loans via pooled funds from a Single Asset Vault, clears a major technical hurdle. Ripple continues to advance DeFi capabilities on the XRP Ledger.