CVE-2026-41847: Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL
Published Jun 9, 2026
·Updated
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.
Affected Software
2 affected components
Spring Spring Framework>=5.3.0<=5.3.48
VMware Spring Framework>=5.3.0<5.3.49
Event History
Jun 9, 2026
CVE Published
via MITRE·03:51 AM
Data Sourced
via MITRE·03:51 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:16 AM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-41847?
The severity of CVE-2026-41847 is medium with a score of 4.8.
2
How do I fix CVE-2026-41847?
To fix CVE-2026-41847, upgrade to a version of Spring Framework later than 5.3.48.
3
What types of applications are affected by CVE-2026-41847?
CVE-2026-41847 affects Spring WebFlux applications utilizing the Kotlin Router DSL.
4
What impact does CVE-2026-41847 have on confidentiality?
CVE-2026-41847 can lead to a low impact on confidentiality due to security filter bypass.
5
When was CVE-2026-41847 published?
CVE-2026-41847 was published on June 9, 2026.