All our latest Blogpost and News about Blockchain security!
Solana audit and tooling Sol-azy: audit-friendly overviews for Solana programs New feature Recap added to sol-azy! (See this article if you don’t know what is sol-azy) What’s new? The new feature Recap turns an Anchor project into a compact, audit-friendly report that you can skim in minutes. It walks the repository, aligns the IDL with the #[derive(Accounts)] definitions, and writes…
Solana Static analyzer Introducing sol-azy: A CLI Toolkit for Solana Program Static Analysis & Reverse Engineering This post dives into sol-azy, our new all-in-one toolkit for security research. Helping in reversing, analyzing, and poking at Solana programs statically, surgically, and on your terms. You can clone it from our GitHub https://github.com/FuzzingLabs/sol-azy What Problem Does sol-azy…
EVM Security Insights from Zer0Con 2025 At Zer0Con 2025, the FuzzingLabs team, Mathieu Hoste and Bryton Bernard, delivered an engaging and insightful presentation on one of the most critical aspects of Ethereum’s security: the vulnerabilities within the Ethereum Virtual Machine (EVM). In our session, titled “Ethereum’s Achilles’ Heel: Attacking and Fuzzing EVMs for Fun (and…
Attacking & Fuzzing of Polkadot Node Triggering Denial-of-Service via Gossamer RPC Flaws Gossamer is a Go-based implementation of a Polkadot node, developed by ChainSafe Systems. It allows interaction with the Polkadot network, enabling users to participate as full nodes, validators, or other roles. In this post, we will show you what we did to find…
rediscovery of the starknet zklend hack How Fuzzing Could Have Prevented the zkLend Hack The recent zkLend hack has stirred up significant discussion in the community, and today we’d like to share some insights from our deep dive into the vulnerability using fuzzing techniques at FuzzingLabs. Our investigation reveals that a simple fuzzing test could…
Story / Security Assessment Completed Strengthening Blockchain-Based IP Management At FuzzingLabs we recently completed a comprehensive security assessment of Story, a decentralized network that aims to revolutionize intellectual property (IP) management. This audit was undertaken to ensure the security and resilience of its blockchain-based infrastructure, smart contracts, and consensus mechanisms. Below, we provide an overview…
Denial Of Service in DeFi Liquidity Pools The Initialization Vulnerability Decentralized Exchanges (DEXs) have become a cornerstone of the DeFi ecosystem, processing billions in daily trading volume. However, during our recent security research at FuzzingLabs we uncovered a subtle yet significant vulnerability pattern that affects multiple DEX implementations. This vulnerability allows malicious actors to effectively…
Poseidon Sponge Bugs in ArkWorks Avoiding Cryptographic Failures in Hashing We found two subtle yet impactful bugs in the ArkWorks library’s implementation of the Poseidon Sponge. This discovery highlights the complexity and precision required in cryptographic implementations. In this article, we’ll first explain what Poseidon Sponge is, how it works, and then delve into the…
Uncovering a Subtle Bug in Ethereum Virtual Machine (EVM) The Case of Arithmetic Negating Zero Our team at FuzzingLabs has been auditing the Ethereum Virtual Machine (EVM) implementation by LambdaClass. Throughout the audit, we’ve identified several vulnerabilities, but in this post, we’ll focus on one particularly interesting issue involving the SDIV operation and its handling…
Top 4 Vulnerabilities in Cairo/Starknet Smart Contracts Detection and Remediation What is Cairo ? In 2021, StarkWare introduced Cairo, a programming language designed for creating provable programs using zero-knowledge proofs. It serves as the smart contract language for Starknet, a layer-2 blockchain built on top of Ethereum. This article explores some of the most common…
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