VULNERABILITY INTELLIGENCE

CVE-2026-25478

CVSS score7.4 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-02-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

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.

Weakness classification

  • CWE-942: Permissive Cross-domain Policy with Untrusted Domains

Primary references