go-xrpl is a Go implementation of the XRP Ledger protocol. In versions through the June 18, 2026 revision identified by the advisory, "ParseMPTAmountBinary" in "internal/ledger/state/ripple_state.go" converts the eight-byte MPT magnitude using "num.Int64()" without checking that it fits in 63 bits. A positive magnitude of at least 2^63 silently wraps into a negative amount without an error. "ParseEscrow" passes 33-byte "sfAmount" fields to the parser and stores "MPTRaw()" in "EscrowData.MPTAmount", causing incorrect downstream calculations and divergence from rippled's interpretation of the same escrow entry. Independently, "readMPTAmount" in "internal/tx/ledgerfields/decode_stream.go" accepts over-limit magnitudes and surfaces large decimal strings without enforcing the maximum signed 64-bit value. The public codec in codec/binarycodec/types/amount.go already rejects these values, leaving the internal decoders inconsistent with that safe path. A source fix is available in commit 9dbd3935ed6c54f0232f2291edf9c012a0900dd5.