CVE-2026-40986

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

State: Published
Severity: 4.8 Medium
Published: Jun 11, 2026
Updated: Jun 23, 2026
Reserved: Apr 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N	vmware

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)

Affected Products

Product	Versions
Spring Web FlowSpring	4.0.0 to before 4.0.0.1Affected 3.0.0 to before 3.0.1.1Affected 2.5.0 to before 2.5.2Affected

References

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

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