CVE-2026-25478

Published: Feb 9, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Litestar: Litestar

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Litestar Litestar	Before 2.20.0

Related CWEs

Permissive Cross-domain Policy with Untrusted Domains

The product uses a cross-domain policy file that includes domains that should not be trusted.

References (4)

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/commit/eb87703b309efcc0d1b087dcb12784e76b003d5a

Source: security-advisories@github.com

Patch

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

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.