CVE-2026-25479

Published: Feb 9, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 3.9 / Impact: 2.5

Source: security-advisories@github.com (Secondary)

Description

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 (1)

Products: Litestar: Litestar

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Litestar Litestar	Before 2.20.0

Related CWEs

Incorrect Regular Expression

The product specifies a regular expression in a way that causes data to be improperly matched or compared.

References (4)

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace

Source: security-advisories@github.com

Patch

https://github.com/litestar-org/litestar/releases/tag/v2.20.0

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.