Solana Foundation has taken action against several network validators involved in sandwich attacks against retail users, expelling them from its delegation program.

These malicious actors utilised mods to enable sandwiching, a form of Maximal Extractable Value (MEV) attack, wherein retail traders receive unfavorable prices while bad actors profit unfairly.

While Solana (CRYPTO:SOL) remains a permissionless blockchain, these validators will no longer receive delegation from the foundation, impacting their privileges within the network.

The move has sparked debate over Solana's decentralisation and its ability to combat malicious activities while preserving network integrity.