CVE-2026-25479

Name: CVE-2026-25479
Creator: NVD / NIST
Published: 2026-02-09T20:15:57.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-25479 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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., . EPSS estimates a 0.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.32%

23.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-185

Affected Software

Vendor	Product	Versions
Litestar	Litestar	< 2.20.0

References

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0Release Notes
https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4acePatch
https://github.com/litestar-org/litestar/releases/tag/v2.20.0Release Notes
https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4Exploit, Vendor Advisory

Timeline

Published: Feb 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-25479?

How severe is CVE-2026-25479?

CVE-2026-25479 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-25479?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-25479?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST