Chain reorganization in a coin that’s worth relatively little could result in freezing funds already processed by exchanges and cross-chain bridges. What Ravencoin actually disclosedOn August 10, the Ravencoin team shared a notice on X asserting that a vulnerability has been “demonstrated and exploited.” As a result, invalid blocks may pass through the unpatched nodes. The total excess issuance was approximately 301.8 million RVN. In an April 28, 2026, postmortem, developer David Burkett said a Mimblewimble Extension Block bug produced a 13-block invalid chain during a second exploitation attempt in April.