Public write-ups on the bugs, patterns, and protocols we audit. Engineer-to-engineer, no fluff.
Gamification in learning often feels hollow. Here's why Zealynx Academy's rank and leaderboard system is different — and why it produces verifiable reputation, not points for points' sake.
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Inside the April 2026 Anthropic MCP SDK design flaw: STDIO transport allows config-to-command-execution across Python, TypeScript, Java, Rust SDKs — by design.
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TheDAO Security Fund awarded the ETHSecurity Badge to Ethereum security contributors. Holders get 4x matching impact in the Ethereum Security QF round, open through May 14, 2026.
ReadGamification in learning often feels hollow. Here's why Zealynx Academy's rank and leaderboard system is different — and why it produces verifiable reputation, not points for points' sake.
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29-point Base L2 audit checklist: block timing exploits, address aliasing, dual gas fees, bridge vulnerabilities, sequencer threats, and fault proof risks.
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Compare Arbitrum, Optimism, and Polygon zkEVM security models. Fraud proofs, ZK validity proofs, upgrade multisigs, and sequencer risks — a data-driven L2 guide.
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Yearn V2 and V3 vault architecture, exploit case studies (yDAI, yUSDT, Cream), and defense patterns every DeFi auditor and integrator must know.
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Compare ERC-3643 and ERC-1400 for RWA compliance. See identity checks, partition tradeoffs, ACT risk, forced transfers, and when each token standard fits.
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Step-by-step guide to building your first Uniswap V4 hook. Learn the essential libraries, contract structure, hook permissions, and critical security considerations for DeFi developers.
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The 2026 security timeline for Web3 protocols: when to audit at design, dev, pre-launch, and post-launch — plus real lead times, audit costs, and launch buffer rules.
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Smart contract audit scoping guide. Seven deliverables auditors need, nSLOC pricing benchmarks, and the Rekt Test — cut your quote 15–30%.
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Audits attest to a commit hash, not protocol safety. Learn how monitoring, invariants, runbooks, and OpSec close the gap — with Euler, Nomad, Ronin, and Radiant case studies.
ReadInside the April 2026 Anthropic MCP SDK design flaw: STDIO transport allows config-to-command-execution across Python, TypeScript, Java, Rust SDKs — by design.
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OWASP ASI04 (Agentic Supply Chain Vulnerabilities) explained: MCP Impersonation, malicious tools, trojanised connectors. Real CVEs, attack patterns, mitigations.
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Complete MCP vulnerability index: 16 disclosed breaches and 14+ CVEs since April 2025 across Anthropic, Cursor, Postmark — with OWASP ASI04 patterns. Updated weekly.
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How flash loans amplify oracle, donation, and reentrancy bugs into $200M+ DeFi exploits — Cetus, Penpie, KyberSwap, UwU Lend case studies plus defenses that hold.
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How attackers exploit DAO governance with flash loans, EVM opcode injection, and quorum exhaustion — plus audit strategies and defense architectures.
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How attackers exploit oracle price feeds in DeFi using flash loans, AMM imbalances, and governance subversion — with defense patterns for protocol architects.
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Most Web3 founders are technical and ship great code, then watch the protocol die to non-code problems. Tokenomics, fundraising, governance, regulatory, GTM — this is what kills teams.
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The 2026 OWASP Smart Contract Top 10 elevated business logic to #2 and added proxy & upgradeability at #10. Here's what changed and how to audit.
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Your complete guide to EthCC 2026 in Cannes. Key dates, side events, networking tips, and how Web3 builders can make the most of the conference.
ReadTheDAO Security Fund awarded the ETHSecurity Badge to Ethereum security contributors. Holders get 4x matching impact in the Ethereum Security QF round, open through May 14, 2026.
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Krait is the Zealynx pre-audit readiness engine. Catch the 12 finding categories that inflate smart contract audit quotes by 30% — locally, free, before booking.
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Shadow audits replay past public security contests on real protocol forks. Learn Web3 security the way top auditors did: reviewing graded contests, fast.
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How fuzz testing catches smart contract bugs that unit tests miss: Foundry invariant testing, property-based fuzzing, and real DeFi exploit examples — Zealynx Security.
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Discover how fuzz testing and formal verification enhance blockchain security. Deep dive into advanced techniques for detecting critical smart contract vulnerabilities.
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Learn how to prepare for a smart contract audit efficiently. Essential checklist for documentation, tests, and code quality to maximize audit productivity.
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Deep dive into Uniswap V2 Router's addLiquidity function line by line. Understand how liquidity is calculated, LP tokens are minted, and what risks liquidity providers face — from impermanent loss to smart contract vulnerabilities.
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Learn about overflow and underflow vulnerabilities in Solidity with real high and medium severity audit findings, code examples, and an exercise to practice.
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Deep dive into Liquity's Stability Pool, liquidation mechanics, and redemption logic — explained from the smart contracts. How LUSD absorbs debt, ETH gets redistributed, and Troves get redeemed.
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Learn how to prepare a security audit summary for an already deployed protocol. A practical walkthrough using the Juicebox Buyback Delegate audit.
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Deep dive into Liquity protocol's smart contracts: LUSD/LQTY tokens, Troves, borrowing mechanics, price feeds, and liquidation logic explained from the source code.
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Explore real-life examples of Denial of Service (DoS) attacks on smart contracts found in audit contests. Learn about DoS caused by underflow, gas limits, nonReentrant modifiers, external calls, and malicious receivers.
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Learn how to use inline assembly (Yul) in Solidity to save gas on hashing, loops, math operations, storage writes, zero-address checks, and ETH balance reads — with side-by-side gas comparisons.
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Deep dive into Aave V3 Pool.sol — supply, withdraw, borrow, and repay functions explained. Understand the core smart contract architecture auditors need to know.
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Learn why using tx.origin for authorization in Solidity is vulnerable to phishing attacks, how attackers exploit it, and how msg.sender prevents it.
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