Security
Token Approvals: They Stay Active Until You Revoke Them
Cointribune·October 21, 2026·1 min read
A crypto authorization granted to a contract remains active after the transaction. From May 5, 2026, attackers exploited this to withdraw 1.42 million dollars from Ekubo users. The exploit targeted unrevoked token approvals, draining funds from wallets that had previously authorized the contract. Users are urged to revoke old approvals to prevent similar losses.
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