---
id: CVE-2026-48061
title: Litestar is an Asynchronous Server Gateway Interface (ASGI) framework
summary: >-
  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
  whiteli…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-644
  - CWE-348
  - CWE-807
vendor: litestar
product: litestar
affected:
  - litestar < 2.22.0
patched:
  - litestar 2.22.0
published: '2026-08-03'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T20:37:00.427'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48061'
references:
  - url: >-
      https://github.com/litestar-org/litestar/commit/6930a20ceb543912cd651b42deae5b9f3637a262
    label: security-advisories@github.com
  - url: >-
      https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv
    label: security-advisories@github.com
  - url: >-
      https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-3qmc-cj7q-62hv'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00375
epssPercentile: 0.28771
aliases:
  - GHSA-3qmc-cj7q-62hv
ecosystem: pip
ingestedAt: '2026-07-07T15:41:59.546Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-48061)

Affected packages:

- `litestar < 2.22.0`

Patched in:

- `litestar 2.22.0`

Source: https://github.com/advisories/GHSA-3qmc-cj7q-62hv