CVE-2026-25478

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0	Release Notes
https://github.com/litestar-org/litestar/commit/eb87703b309efcc0d1b087dcb12784e76b003d5a	Patch
https://github.com/litestar-org/litestar/releases/tag/v2.20.0	Release Notes
https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:litestar:litestar:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-09 20:15

Updated : 2026-02-17 15:15

NVD link : CVE-2026-25478

Mitre link : CVE-2026-25478

CVE.ORG link : CVE-2026-25478

JSON object : View

Products Affected

litestar

litestar

CWE

CWE-942

Permissive Cross-domain Security Policy with Untrusted Domains

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