CVE-2026-48061 (GCVE-0-2026-48061)

Vulnerability from cvelistv5 – Published: 2026-08-03 20:47 – Updated: 2026-08-04 15:05
VLAI
Title
Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header
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 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.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 13:33 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
litestar-org litestar Affected: < 2.22.0
guessed Create a notification for this product.
Show details on NVD website
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