Langfuse Slack OAuth Installation Endpoint Lacks Authentication, Enabling Arbitrary Project Linking

Langfuse is an open source large language model engineering platform. In versions 3.146.0 and below, the /api/public/slack/install endpoint initiates Slack OAuth using a projectId provided by the client without authentication or authorization. The projectId is preserved throughout the OAuth flow, and the callback stores installations based on this untrusted metadata. This allows an attacker to bind their Slack workspace to any project and potentially receive changes to prompts stored in Langfuse Prompt Management. An attacker can replace existing Prompt Slack Automation integrations or pre-register a malicious one, though the latter requires an authenticated user to unknowingly configure it despite visible workspace and channel indicators in the UI. This issue has been fixed in version 3.147.0.

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访问控制不恰当

langfuse 访问控制错误漏洞

langfuse是Langfuse开源的一个大语言模型工程平台。 langfuse 3.146.0及之前版本存在访问控制错误漏洞，该漏洞源于/api/public/slack/install端点使用未经身份验证或授权的客户端提供的projectId发起Slack OAuth，可能导致攻击者将其Slack工作区绑定到任意项目并接收提示更改。

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