For 11 Years, a Few Hundred XRP Could Have Printed XRP Past the 100 Billion Cap. Ripple's Engineers Patched It Without Telling Anyone Why
A 2015-era integer overflow in the XRP Ledger's payment engine let one transaction create spendable XRP beyond the fixed 100 billion supply, at the cost of a few hundred XRP in refundable reserves plus fees. Cayden Liao and Veria AI reported it on Sept. 22, xrpld 3.4.1 quietly fixed it on Sept. 25, and the full disclosure only landed on Oct. 9. No exploitation has been found.