Is CVE-2026-25479 actively exploited?

CVE-2026-25479 has no public evidence of in-the-wild exploitation as of 2026-02-17.

What is the CVSS score for CVE-2026-25479?

CVE-2026-25479 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

How do I patch CVE-2026-25479?

Patch guidance is available from litestar security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-25479.

CVE-2026-25479 - remediation guidance & executive summary

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-185

Metadata

Primary Vendor: LITESTAR
Published: 2/9/2026
Last Modified: 2/17/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

litestar : litestar

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-25479. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-25479

View on NIST NVD

CVE-2026-25479 vulnerability