CVE-2026-41847

Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL

At a glance

Severity: MEDIUM 4.8
EPSS: EPSS 0.17 % · percentile 6 (2026-10-27)
State: PUBLISHED
Published: 2026-06-09
Updated: 2026-06-09
Assigner: vmware
NVD status: Analyzed

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

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	vmware
CVSS 3.1	MEDIUM 4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · security@vmware.com (Secondary)
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-284

Advisories

GHSA-vqgp-pf68-6947 — Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL

European references

ENISA EUVD · EUVD-2026-35335
GCVE · GCVE-0-2026-41847

CERT-FR advisories

CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* ≥ 5.3.0 < 5.3.49

Affected products

Product	Versions
Spring · Spring Framework	affected 5.3.0 < 5.3.49

References

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

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD