Spring WebFlux Kotlin Router DSL Security Bypass (5.3.0-5.3.48)
CVE-2026-41847 Published on June 9, 2026
Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL
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.
Vulnerability Analysis
CVE-2026-41847 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-41847 has been classified to as an Authorization vulnerability or weakness.
Affected Versions
Spring Framework:- Version 5.3.0 and below 5.3.49 is affected.