> For the complete documentation index, see [llms.txt](https://zokyo-auditing-tutorials.gitbook.io/zokyo-tutorials/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zokyo-auditing-tutorials.gitbook.io/zokyo-tutorials/tutorial-67-erc1155-vulnerabilities.md).

# Tutorial 67: ERC1155 Vulnerabilities

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As we dive deeper into the world of NFTs and blockchain technology, it's important to expand our focus beyond the popular ERC-721 standard to cover other essential NFT standards, like **ERC-1155**. The **ERC-1155** standard offers enhanced functionality by supporting both fungible and non-fungible tokens in a single contract, making it a versatile option for developers. However, with this flexibility comes additional complexities and potential vulnerabilities.

In this section, we'll explore key vulnerabilities that can arise when using the ERC-1155 standard. From improper handling of transfers to compatibility issues and security flaws in contract design, understanding these risks is crucial for ensuring robust and secure applications. By analyzing these vulnerabilities, we aim to help developers and auditors safeguard their projects and maintain the integrity of their NFT ecosystems.