InfoSecBulletin Cybersecurity for mankind
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.
Citrix NetScaler SAML 0-Day Flaw Under Attack
By infosecbulletin
/ Monday , October 5 2026
Citrix has put out emergency security updates for a NetScaler SAML flaw that hackers are using. Known as CVE-2026-88779, this...
Read More
Major Danish university breached, 200,000 users at risk
By infosecbulletin
/ Monday , October 5 2026
Hackers got into the identity and access management system at the Technical University of Denmark (DTU) and downloaded a lot...
Read More
Microsoft’s X account hijacked to promote Clippy crypto scam
By infosecbulletin
/ Sunday , October 4 2026
Microsoft's official X account was taken over to promote an unapproved Clippy-themed cryptocurrency. The tech giant’s X account, with 13...
Read More
Critical cPanel, GitLab AI Gateway and Dell CSM Flaws Enable RCE And Admin Hijacking
By infosecbulletin
/ Saturday , October 3 2026
CPanel has put out security updates to fix three problems in cPanel & WHM. These problems could let attackers take...
Read More
Nearly 100,000 email addresses exposed in first AI-related data breach in Singapore
By infosecbulletin
/ Friday , October 2 2026
Nearly 100,000 Bee Cheng Hiang customers had their email addresses leaked when an employee used an AI tool to generate...
Read More
Hackers Exploit Zimbra Mail Servers: TeamViewer patched 5 critical flaws
By infosecbulletin
/ Thursday , October 1 2026
Hackers to exploit a flaw in Zimbra mail servers that are connected to the Internet. They send special emails that...
Read More
Google Warns of Hackers Actively Exploiting Citrix 0-Day Flaws
By infosecbulletin
/ Wednesday , September 30 2026
Google has said that hackers are using two serious Citrix NetScaler security holes to get root access, set up hidden...
Read More
CISA Warns Critical MikroTik RouterOS Flaw While Cisco SD-WAN Zero-Day Exploited in Attacks
By infosecbulletin
/ Wednesday , September 30 2026
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is alerting people about a major flaw in MikroTik RouterOS. This could...
Read More
Apple Zero-Day Exploited: Pentagon Data Breach Reportedly Exposes Sensitive Data of 3 Million People
By infosecbulletin
/ Tuesday , September 29 2026
Apple has launched iOS 26.7.1 and iPadOS 26.7.1 to fix a serious zero-day flaw that it believes might have been...
Read More
JadePuffer Agentic AI targets and destroys Azure’s cloud resources
By infosecbulletin
/ Tuesday , September 29 2026
The JadePuffer ransomware group is attacking Azure users with agent-based attacks that gather information, steal passwords, and damage key components. The...
Read More
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.
