The Solana Foundation has expelled several validators from its delegation program for conducting sandwich attacks on retail users.
In a recent Discord announcement, Tim Garcia, the Team Lead of Solana Validator Relations, confirmed that the removals were permanent, stating that the foundation identified operators involved in mempool activities supporting sandwich attacks.
He stated:
“Enforcement actions are ongoing as we detect operators participating in mempools which allow sandwich attacks.”
A sandwich attack involves placing two transactions around a target transaction to manipulate the price and profit from the difference. According to Garcia, this tactic violates the Solana Foundation’s rules.
Protecting retail users
Mert Mumtaz, co-founder of Helius, explained that some validators were using these attacks to secure better prices for themselves at the expense of retail traders.
“A sandwich attack is a malicious form of MEV attack that ensures retail always gets the worst p
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