{"id":"CVE-2026-41839","summary":"Spring Framework Escalation via Session Fixation in WebFlux","details":"A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.","aliases":["GHSA-4hfh-6x8g-gwpp"],"modified":"2026-11-01T10:45:24.263464507Z","published":"2026-06-09T03:49:52.381Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"7.0.0"},{"fixed":"7.0.7.1"},{"introduced":"6.2.0"},{"fixed":"6.2.18.1"},{"introduced":"6.1.0"},{"fixed":"6.1.28"},{"introduced":"5.3.0"},{"fixed":"5.3.49"}]}]}],"cna_assigner":"vmware","cwe_ids":["CWE-384"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41839.json"},"references":[{"type":"WEB","url":"https://spring.io/security/cve-2026-41839"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41839.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41839"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/spring-projects/spring-framework","events":[{"introduced":"5024bb72279188f1d0dcfe19e8abdd4bdb9887c8"},{"fixed":"6214eae8bd02c2ed7ab382bb8d16a9cc6de49522"},{"introduced":"fe00848be255db1455f0189d9ff28661f301be36"},{"fixed":"9e8cea3ef8ae02efb7956b071cd7bbef7c22cb82"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"6.2.0"},{"fixed":"6.2.19"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*"},{"cpe":"cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*","range":[{"introduced":"7.0.0"},{"fixed":"7.0.8"}],"source":"CPE_RANGE"}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-41839.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}