CVE-2026-40986 Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML

Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which can result in a scripting attack in the user's browser if the error response from the server contains error details with input reflected from an attacker...

Engel & Völkers Technology GmbH: CSS-Reflected

Summary: Cross Site Scripting reflected Steps To Reproduce: This POC is on how to redirect user to the malicious website to steal credentials or any sensitive information. 1.How the request has been intercepted F1074840 2.What was the ResponseRendered F1074843 or F1074850 3.Which tools are used: ...