User Enumeration via Distinct Error Messages in langgenius/dify-web

In langgenius/dify-web version 1.6.0, the authentication mechanism reveals the existence of user accounts by returning different error messages for non-existent and existing accounts. Specifically, when a login or registration attempt is made with a non-existent username or email, the system responds with a message such as "account not found." Conversely, when the username or email exists but the password is incorrect, a different error message is returned. This discrepancy allows an attacker to enumerate valid user accounts by analyzing the error responses, potentially facilitating targeted social engineering, brute force, or credential stuffing attacks.

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标准化错误处理机制缺失

dify 安全漏洞

dify是LangGenius开源的一个开源的 LLM 应用程序开发平台。 dify 1.6.0版本存在安全漏洞，该漏洞源于身份验证机制对不存在的账户和现有账户返回不同的错误消息，可能导致账户枚举攻击。

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