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Defi Security

5 articles on this topic.

DeFi & Smart Contract Security21 July 2026

Allbridge Core Loses $1.65M to a Flash Loan Pricing Bug It Fixed in 2023

A flash loan against Allbridge Core's Solana stablecoin pools distorted internal pricing and let an attacker drain roughly $1.65 million — the same class of bug the protocol says it patched on BNB Chain three years ago.

defi-securityflash-loanweb3
3 min readRead
DeFi & Smart-Contract Security19 July 2026

Summer Finance's $6M Vault Accounting Bug Ends in Full Shutdown

A flash-loan attacker exploited how Summer Finance's Fleet Commander vault priced its underlying strategies, extracting $6 million in a single transaction — and the protocol has now wound down entirely.

defi-securityflash-loan-attacksmart-contract-security
4 min readRead
Web3 & DeFi Security11 July 2026

Summer.fi's $6M Vault Exploit Is a Playbook for Donation-Based Share Manipulation

A three-month-old attacker wallet used a $65M flash loan and a donation to a strategy adapter pending removal to skew vault share pricing, draining $6.04M from two Lazy Summer USDC vaults before guardians could react.

defi-securityflash-loan-attacksmart-contract-exploit
5 min readRead
Web3 / Smart Contract Security1 July 2026

Aztec Connect: $2.1M Stolen From a Bridge With No One Left to Fix It

A proof-verification flaw let an attacker drain a DeFi privacy bridge that Aztec Labs deprecated three years ago and can no longer patch, pause, or upgrade — a case study in what "immutable" really costs.

defi-securitysmart-contractsweb3
4 min readRead
Web3 & DeFi Security29 June 2026

Secret Network–Axelar Bridge Drained $4.67 M via Infinite-Mint Bug Hidden for Seven Days

An attacker exploited a removed source-validation check to mint unbacked wrapped tokens on Secret Network, redeeming them through Axelar's legitimate channel — and nobody noticed for a week.

secret-networkaxelarbridge-exploit
4 min readRead