FastMCP: Post-transform component authorization is skipped on direct calls

影響: pip:fastmcp >= 3.0.0, < 3.4.10 → 3.4.10, pip:fastmcp >= 4.0.0, < 4.1.2 → 4.1.2, pip:fastmcp-slim >= 3.0.0, < 3.4.10 → 3.4.10, pip:fastmcp-slim >= 4.0.0, < 4.1.2 → 4.1.2

Maintainer assessment and remediation This report is accepted as a FastMCP authorization vulnerability. In supported configurations, a server transform can change the metadata used by a component's authorization policy. Direct lookups previously checked the original component but returned the transformed component without rechecking its policy. A client that knows the component identifier can invoke a tool or retrieve a resource or prompt that the configured policy denies. The fixes authorize t…

在 GitHub Advisory Database 阅读

2026/10/24 06:32，GitHub Advisory Database 发布了“FastMCP: Post-transform component authorization is skipped on direct calls”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python。