CVE-2026-25478 | THREATINT

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.

PUBLISHED Reserved 2026-02-02 | Published 2026-02-09 | Updated 2026-02-10 | Assigner GitHub_M

HIGH: 7.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Problem types

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

Product status

< 2.20.0

affected

References

github.com/...testar/security/advisories/GHSA-2p2x-hpg8-cqp2

github.com/...ommit/eb87703b309efcc0d1b087dcb12784e76b003d5a

docs.litestar.dev/2/release-notes/changelog.html

github.com/litestar-org/litestar/releases/tag/v2.20.0

cve.org (CVE-2026-25478)

nvd.nist.gov (CVE-2026-25478)

Download JSON