{"id":"CVE-2026-41847","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-41847","summary":"Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL","details":"Spring WebFlux applications may be vulnerable to a security bypass when using the Kotlin Router DSL.\n\nAffected versions:\nSpring Framework 5.3.0 through 5.3.48.","published":"2026-06-09T06:31:58Z","modified":"2026-07-30T18:56:42.322390Z","cvss":{"score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00166,"percentile":0.0613,"asOf":"2026-09-02"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework:spring-webflux","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41847"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-framework"},{"type":"WEB","url":"https://spring.io/security/cve-2026-41847"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-30T18:56:42.322390Z"}}