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Oracle manipulation
Oracle manipulation is an attack in which someone distorts the price or data a smart contract reads from an oracle, then uses the false value to borrow too much, trigger liquidations or buy assets too cheaply. It often targets apps that read a price from a single thin trading pool.
What it means for you. If you lend, borrow or provide liquidity, a manipulated price can liquidate your position or drain the pool you deposited into, though you did nothing wrong. You can check an app's documentation for where its prices come from: one pool's spot price is easier to move than an average over time or a feed drawn from many independent sources.
Sources: ethereum.org: Smart contract security (oracle manipulation), ethereum.org: Oracles · checked 4 October 2026
Oracle
An oracle is a service that brings information from outside a blockchain, such as a coin's price, onto the chain so smart contracts can use it. Blockchains cannot fetch outside data on their own, so lending, trading and insurance contracts rely on oracles.
What it means for you. A contract is only as accurate as the data it reads. If an oracle reports a wrong or manipulated price, a protocol can liquidate positions or let attackers drain funds, and the code will treat it as valid. Check which oracle a protocol uses and whether it depends on a single source.
Source: ethereum.org: Oracles · checked 4 October 2026