Vmware Spring Framework up to 5.3.48 WebFlux Kotlin Router DSL access control

Summaryinfo

A vulnerability labeled as critical has been found in Vmware Spring Framework up to 5.3.48. Affected by this issue is some unknown functionality of the component WebFlux Kotlin Router DSL. The manipulation results in access control. This vulnerability is cataloged as CVE-2026-41847. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Vmware Spring Framework up to 5.3.48. Affected is an unknown part of the component WebFlux Kotlin Router DSL. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at spring.io. This vulnerability is traded as CVE-2026-41847 since 04/22/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/09/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 5.3.49 eliminates this vulnerability.

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Productinfo

Vendor

• Vmware

Name

• Spring Framework

Version

• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3
• 5.3.4
• 5.3.5
• 5.3.6
• 5.3.7
• 5.3.8
• 5.3.9
• 5.3.10
• 5.3.11
• 5.3.12
• 5.3.13
• 5.3.14
• 5.3.15
• 5.3.16
• 5.3.17
• 5.3.18
• 5.3.19
• 5.3.20
• 5.3.21
• 5.3.22
• 5.3.23
• 5.3.24
• 5.3.25
• 5.3.26
• 5.3.27
• 5.3.28
• 5.3.29
• 5.3.30
• 5.3.31
• 5.3.32
• 5.3.33
• 5.3.34
• 5.3.35
• 5.3.36
• 5.3.37
• 5.3.38
• 5.3.39
• 5.3.40
• 5.3.41
• 5.3.42
• 5.3.43
• 5.3.44
• 5.3.45
• 5.3.46
• 5.3.47
• 5.3.48

License

• commercial

Website

• Vendor: https://www.vmware.com/

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