2026-08-21

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New web3 security vulnerability disclosures and CVEs in the last 48 hours

- Web3-security library identifies a critical vulnerability affecting smart contract deployments, potentially leading to unauthorized access and financial loss. [Web3-Security-Library/Vulnerabilities/…

RESEARCH: New web3 security vulnerability disclosures and CVEs in the last 48 hours

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Summary

  • Web3-security library identifies a critical vulnerability affecting smart contract deployments, potentially leading to unauthorized access and financial loss. Web3-Security-Library/Vulnerabilities/README.md at main
  • GitHub Advisory Database reports multiple critical advisories related to smart contract logic flaws, emphasizing the need for rigorous testing and code review. GitHub Advisory Database

Key Developments

  • CVE‑2026‑40072 detail reveals an authentication bypass vulnerability in a widely-used blockchain node software, allowing attackers to execute arbitrary transactions without proper authorization. CVE‑2026‑40072 Detail - NVD
  • Vulnerability Summary for the week of August 3, 2026 highlights a surge in disclosed web3 vulnerabilities, with notable findings including replay attacks on decentralized exchanges and reentrancy issues in token contracts. Vulnerability Summary for the Week of August 3, 2026
  • GitHub CVEs and Security Vulnerabilities - OpenCVE database shows an increase in reported exploits targeting smart contract interfaces, stressing the importance of up-to-date security patches. Github CVEs and Security Vulnerabilities - OpenCVE

(Returned COMPLETE fixed document as requested.)

Sources