CVE-2026-40986

MEDIUM

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

Title source: cna

Description

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.

References (1)

Core 1

Core References

https://spring.io/security/cve-2026-40986

Scores

CVSS v3 4.8

EPSS 0.0015

EPSS Percentile 4.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (3)

Spring/Spring Web Flow 2.5.0 - 2.5.2

Spring/Spring Web Flow 3.0.0 - 3.0.2

Spring/Spring Web Flow 4.0.0 - 4.0.1

Published Jun 11, 2026

Tracked Since Jun 11, 2026