CVE-2026-48061— Litestar 跨站脚本漏洞

Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. In versions prior to 2.22.0, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a whitelisted domain. The AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Since X-Forwarded-Host is a client-controllable header, this enables host header injection attacks such as password reset poisoning, cache poisoning, and server-side request routing manipulation. Any application using AllowedHostsConfig is affected when deployed without a reverse proxy that strips X-Forwarded-Host, or when accepting HTTP/1.0 connections. This issue has been fixed in version 2.22.0.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

对HTTP头部进行脚本语法转义处理不恰当

Litestar 跨站脚本漏洞

Litestar是Litestar组织开源的一款基于Python的异步Web开发框架。 Litestar 2.22.0之前版本存在跨站脚本漏洞，该漏洞源于AllowedHostsMiddleware在缺少Host标头时信任客户端可控的X-Forwarded-Host标头作为回退，导致攻击者可以绕过允许主机验证，发起主机标头注入攻击，如密码重置投毒、缓存投毒和服务端请求路由操纵。

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