Decred, a Layer 1 blockchain, said an inflation vulnerability was exploited on its mainnet between Aug. 16 and 17, resulting in the irregular creation of 2,077.96933695 DCR, worth about $30,000 at the time of reporting. The flaw had been present in consensus code since the network launched in February 2016 and involved an edge case between the regular transaction tree and the stake transaction tree that allowed inputs to be spent twice. The vulnerability was submitted through Decred's bounty program on Aug. 12 and exploited about 72 hours later. Decred said it issued an emergency patch, identified as version 2.1.6 and released on Aug. 18, while asking exchanges to temporarily suspend DCR deposits and withdrawals. The project monitored for further double-spending and reported no additional irregular issuance after the patch. Most ecosystem participants upgraded within about 24 hours, and Decred did not roll back the chain to limit disruption. The additional DCR does not affect the 21 million-coin hard cap and remains far below more than 215,000 DCR in historical under-issued subsidies attributed to factors including missed votes. CoinMarketCap showed DCR at $13.98, up 0.75%, at the time of writing. Decred has also developed a double-spend monitoring service and plans to improve emergency upgrade signaling.