← Back to CVEs

CVE-2026-25479

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2026

Last Modified2/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

litestar:litestar

Weaknesses (CWE)

CWE-185

References

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0(security-advisories@github.com)

https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace(security-advisories@github.com)

https://github.com/litestar-org/litestar/releases/tag/v2.20.0(security-advisories@github.com)

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

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.