CVE-2026-25478

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-942

Affected software

No affected versions have been published.

Timeline

Published: Feb 9, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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