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Suggestion detail

Untriaged
Permalink CVE-2026-25479
6.5 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): LOW
  • Integrity impact (I): LOW
  • Availability impact (A): NONE
created 2 months, 1 week ago Activity log
  • Created suggestion 2 months, 1 week ago
Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in configured host patterns

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.

Affected products

litestar
  • ==< 2.20.0

Matching in nixpkgs

pkgs.litestar

Production-ready, Light, Flexible and Extensible ASGI API framework

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