https://cryptoslate.com/researchers-discover-vulnerabilities-in-bitcoin-layer-2-lightning-network/

bitcoin

Mass Exit Attacks on the Lightning Network [PDF]

cryptocoin

For additional comments, see another post, here on SN:

*Researchers discover vulnerabilities in Bitcoin layer-2 Lightning Network*
https://stacker.news/items/58187
https://cryptoslate.com/researchers-discover-vulnerabilities-in-bitcoin-layer-2-lightning-network/