CVE-2026-40986mediumCWE-79

CVE-2026-40986: medium-severity vulnerability in Spring Web Flow

Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML

Published · Updated

Follow this CVE+ Monitor Spring Web Flow+ Monitor org.springframework.webflow:spring-webflow

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.8epss 0.2%
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. Affected versions: Spring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
Affected products
Spring · Spring Web Flow
Related CVEs — Spring Web Flow

In the same product, most dangerous first.

CVE-2026-40985MEDIUMData Binding Vulnerability in Spring Web Flow with Unified EL ParserEPSS 0.2%