Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.

Project Subscriptions

Vendors Products
Litestar-org Subscribe
Litestar Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-2p2x-hpg8-cqp2 Litestar's CORS origin allowlist has a bypass due to unescaped regex metacharacters in allowed origins
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 10 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Litestar-org
Litestar-org litestar
Vendors & Products Litestar-org
Litestar-org litestar

Mon, 09 Feb 2026 19:30:00 +0000

Type Values Removed Values Added
Description Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.
Title Litestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed origins
Weaknesses CWE-942
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-10T16:01:16.807Z

Reserved: 2026-02-02T16:31:35.820Z

Link: CVE-2026-25478

cve-icon Vulnrichment

Updated: 2026-02-10T15:30:26.193Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T20:15:57.017

Modified: 2026-02-09T21:55:30.093

Link: CVE-2026-25478

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T16:26:54Z

Weaknesses