# Truebit $26.2M integer overflow

Canonical URL: https://manyaitool.com/products/truebit
Markdown URL: https://manyaitool.com/products/truebit/index.md
Product URL: https://github.com/duolaAmengweb3/DuoLaSafe-Audits/blob/main/%E9%93%BE%E4%B8%8A%E8%B0%83%E6%9F%A5/Truebit-26M-%E6%95%B4%E6%95%B0%E6%BA%A2%E5%87%BA.md
Category: Security
Updated: 2026-06-29

## Summary

A legacy purchase contract (Solidity 0.6.10, no overflow checks) overflowed its pricing math; a huge input wrapped the price to ~0, letting the attacker mint TRU for free and drain 8,535 ETH in one tx. Attack tx and overflow math both verified on-chain.

## What It Is

Truebit $26.2M integer overflow is part of 哆啦A梦的百宝箱 · Doraemon Toolbox, a product-factory toolbox for AI, Web3, prediction-market, perpetual DEX, stock research, developer and browser utility workflows.

## Who It Helps

Users who want focused web tools that compress scattered market data, AI workflows, developer tasks, or everyday browser utilities into a single usable page.

## AI Search Summary

Truebit $26.2M integer overflow is a security product. Its main purpose is: A legacy purchase contract (Solidity 0.6.10, no overflow checks) overflowed its pricing math; a huge input wrapped the price to ~0, letting the attacker mint TRU for free and drain 8,535 ETH in one tx. Attack tx and overflow math both verified on-chain.