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**Name of the Vulnerable Software and Affected Versions** Ktor versions prior to 1.3.0 **Description** The issue allows for request smuggling when Ktor is run behind a proxy that does not properly handle Content-Length and Transfer-Encoding, or does not handle ` ` as a headers separator. This can occur when the proxy does not correctly process requests with specific headers, potentially leading to security issues. **Recommendations** For versions prior to 1.3.0, migrate to a version that is 1.3.0 or later to resolve the issue. As a temporary workaround, consider using a better proxy that correctly handles Content-Length, Transfer-Encoding, and ` ` as a headers separator to minimize the risk of exploitation.