CVE-2026-41847

Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL

State: Published
Severity: 4.8 Medium
Published: Jun 9, 2026
Updated: Jun 9, 2026
Reserved: Apr 22, 2026

Description

Spring WebFlux applications may be vulnerable to a security bypass when using the Kotlin Router DSL.

Affected versions: Spring Framework 5.3.0 through 5.3.48.

Scores

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

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
Spring FrameworkSpring	5.3.0 to before 5.3.49Affected

References

https://spring.io/security/cve-2026-41847

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