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OWASP has released the Smart Contract Top 10: 2026, a guide to help Web3 developers, security auditors, and protocol owners identify critical vulnerabilities in smart contracts.
This edition, part of the OWASP Smart Contract Security initiative, uses security incidents and survey data from 2025 to identify the most impactful risks ahead.
Hackers deploy Casbaneiro Trojan that activates on bank websites
By infosecbulletin
/ Monday , September 14 2026
Casbaneiro is going after online banking users by sending fake messages that seem like urgent bills or legal papers. The...
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German police read Signal, Telegram, WhatsApp messages without breaking encryption
By infosecbulletin
/ Saturday , September 12 2026
German law enforcement agencies are using features built into apps such as WhatsApp to monitor people’s messages without breaking their...
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Urgent Patch! cPanel, GitLab Flaws Expose Users to RCE, File and Credential Theft
By infosecbulletin
/ Friday , September 11 2026
GitLab has released an important security update to fix two serious problems. These issues could allow unauthorized file access and...
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Palo Alto PAN-OS Flaw Enables Root Arbitrary Code Execution
By infosecbulletin
/ Thursday , September 10 2026
Palo Alto Networks has revealed a serious flaw in PAN-OS. It may let a remote attacker without a password run...
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Critical Check Point VPN flaws allow remote code execution attacks
By infosecbulletin
/ Thursday , September 10 2026
Check Point Software has revealed and fixed two major VPN flaws, CVE-2026-85102 and CVE-2026-85103. Both have a top CVSS score...
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Cisco confirms CVE-2026-20079 flaw in Secure FMC is exploited in attacks
By infosecbulletin
/ Thursday , September 10 2026
Cisco has said that a serious security flaw CVE-2026-20079 in its Secure Firewall Management Center (FMC) software is being used...
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Hackers exploit PaperCut flaws using hundreds of AI agents, compromising 440 servers globally
By infosecbulletin
/ Thursday , September 10 2026
A Russian-speaking hacker has used artificial intelligence like never before. They sent out hundreds of AI agents to find and...
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CISA Says Chinese Firms Extracted Billions of Tokens From Frontier AI Models
By infosecbulletin
/ Thursday , September 10 2026
Six Chinese AI companies ran large-scale attacks on American AI models since late 2024, according to U.S. cybersecurity and intelligence...
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Nightmare Eclipse Drops New Microsoft Defender ‘ShieldCrash’ zero-day
By infosecbulletin
/ Wednesday , September 9 2026
An unknown security expert called Nightmare Eclipse has drops a new Microsoft Defender flaw called "ShieldCrash" right after Microsoft released...
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cPanel Flaw Lets Hosting Accounts With Mail Privileges Execute Code as Root
By infosecbulletin
/ Wednesday , September 9 2026
cPanel has shared CVE-2026-67401, a serious SQL injection flaw in EmailTrack. This flaw could allow attackers with permission to take...
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The 2026 ranking shows that attackers are evolving. They are now combining different vulnerabilities, such as linking flash loans with oracle manipulation and exploiting poor upgrade governance, to cause more financial harm.
2026 Ranking
| Rank | Vulnerability | Description |
|---|---|---|
| SC01:2026 | Access Control Vulnerabilities | Flaws that allow unauthorized users or roles to invoke privileged functions or modify critical state, often leading to full protocol compromise. |
| SC02:2026 | Business Logic Vulnerabilities | Design-level flaws in lending, AMM, reward, or governance logic that break economic or functional rules, enabling value extraction even when low-level checks appear correct. |
| SC03:2026 | Price Oracle Manipulation | Weak oracles and unsafe price integrations that let attackers skew reference prices, enabling under-collateralized borrowing and mispriced swaps. |
| SC04:2026 | Flash Loan–Facilitated Attacks | Attacks using large, uncollateralized flash loans to amplify small logic, pricing, or arithmetic bugs into large drains within a single transaction. |
| SC05:2026 | Lack of Input Validation | Missing or weak validation of user, admin, or cross-chain inputs that allows unsafe parameters to reach core logic, corrupting state or enabling fund loss. |
| SC06:2026 | Unchecked External Calls | Unsafe interactions with external contracts where failures, reverts, or callbacks are not safely handled, often enabling reentrancy or inconsistent state. |
| SC07:2026 | Arithmetic Errors | Subtle bugs in integer math, scaling, and rounding — especially in share, interest, and AMM calculations — that can siphon value when paired with flash loans. |
| SC08:2026 | Reentrancy Attacks | External calls that re-enter vulnerable functions before state is fully updated, allowing repeated withdrawals or state changes from outdated contract views. |
| SC09:2026 | Integer Overflow and Underflow | Dangerous arithmetic on code paths without robust overflow checks, leading to wrapped values, broken invariants, and potential liquidity drains. |
| SC10:2026 | Proxy & Upgradeability Vulnerabilities | Misconfigured or weakly governed proxy, initialization, and upgrade mechanisms that let attackers seize control of implementations or reinitialize critical state. |
Over $2.2 billion has been lost to crypto hacks recently, highlighting the need for a structured vulnerability framework in the blockchain ecosystem.
The OWASP Smart Contract Top 10: 2026 is designed to work with other OWASP resources like the SC Weakness Enumeration, Checklist, and Top 15 Web3 Attack Vectors to create a full framework for secure smart contract development, auditing, and compliance.
