Medium 4.8Published Jun 8, 2026

CVE-2026-41847Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL

Updated under an hour ago (Oct 26, 2026, 2:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: vmware
NVD analysis: Analyzed
Record last updated: Jun 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Spring Spring Framework spring:framework (from the name)	from 5.3.0 before 5.3.49	CNA record
vmware spring_framework vmware:spring_framework	from 5.3.0 before 5.3.49	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.