Reletter
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Leading finance security firm in APAC. Trusted by top blockchain customers such as Binance, Bullish, Bybit, Galaxy Digital, Polygon, BNB Chain, Aptos, Sui, Kakao, Line Corp, Abu Dhabi Blockchain Center (ADBC), as well as many banks and mobile wallets.

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Substack
PricingOnly free issuesPublishesWeekly
Issues184Founded4 years agoLast Issue12 days ago
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Latest Issues

Denaria Finance Exploit: When divCeil Meets an Unsafe Cast

On April 5, 2026, the decentralized perpetual exchange Denaria Finance on the Linea blockchain fell victim to an exploit that resulted in a loss of approximately $165,618 USDC. This analysis breaks down the attack mechanics and pinpoints th...

12 days ago

When Signing Is Not Secure

On April 23, 2026, GiddyDefi’s GiddyVaultV3 contracts on Ethereum were exploited for an estimated loss of approximately $1.3M. The bug was not a flashloan trick or a price manipulation. It was an authorization bug: the vault accepted a back...

13 days ago

Hyperbridge incident analysis

On April 13, 2026, Hyperbridge was exploited through a vulnerability on the custom logic, resulting in the loss of approximately $242,000. Let’s take a closer look at how the attack was carried out.

Original Attacker: https://etherscan.io/...

14 days ago

How a Missing Bounds Check Led to $237K Exploit on Hyperbridge

On April 13, 2026, an attacker minted 1 billion bridged DOT tokens out of thin air on Ethereum - and dumped them for roughly $237,000 in ETH. The target was Hyperbridge, Polytope Labs’ trust-minimized interoperability protocol connecting Po...

a month ago

Deep Dive into the dTRINITY cbBTC Exploit

Overview

On March 17, 2026, the DeFi protocol dTRINITY, a lending protocol on Ethereum, suffered a security incident resulting in an estimated loss of ~$257.3K.

The exploit stemmed from an empty market weakness commonly found in forks...

a month ago

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  • TK
  • nt
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  • LCD
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  • lifebow

    Security Researcher

  • th13vn

    Web3 Security Auditor @Verichains

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