CVE-2026-48061
Medium · CVSS 5.9Published 2026-08-03
CVSS
5.9
Medium
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-48061?
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 Score Explained
CVSS 5.9 is Medium severity. Exploitation usually requires some specific conditions (local access, user interaction, or a particular config). Still worth patching in your next maintenance window.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/litestar-org/litestar/commit/6930a20ceb543912cd651b42deae5b9f3637a262
- ›https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv
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