CVE-2026-48060
Description
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to version 2.20.0, Litestar instances which use a template engine in conjunction with CSRF protection are vulnerable to HTML Injection which can be escalated to Cross Site Scripting due to the contents of the CSRF cookie being excluded from automatic escaping by the template engine when configured inline with documentation recommendations. This issue has been patched in version 2.20.0.
Summary dbcve.org
Litestar versions prior to 2.20.0 are vulnerable to HTML Injection that can escalate to XSS when using the template engine with CSRF protection. The CSRF cookie value is not automatically escaped by the template engine when configured according to documentation recommendations, allowing attackers to inject malicious scripts via the cookie.
Mitigation
Upgrade Litestar to version 2.20.0 or later. This is a framework-level patch that fixes the template escaping behavior for CSRF cookie values.