CVE-2026-41847 MEDIUM

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

Vendor Spring

Product Spring Framework

Weakness CWE-284

Published June 9, 2026

Last update June 9, 2026

View on NVD All CVEs

CVSS base score

4.8/10

Attack vector Network

Attack complexity High

Privileges required None

User interaction None

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 9, 2026 CVE published

June 9, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-41847 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/284.html

Related vulnerabilities

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

01Description

02Disclosure timeline

03References

04Related CVE