{"id":"CVE-2026-41838","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-41838","summary":"Spring Framework Predictable Session ID in WebSocket Module","details":"IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be possible to exploit in combination with inadequate authorization rules.\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.","published":"2026-06-09T06:31:57Z","modified":"2026-07-29T18:16:34.978489898Z","cvss":{"score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework:spring-websocket","fixedVersion":"7.0.8"},{"ecosystem":"Maven","name":"org.springframework:spring-websocket","fixedVersion":"6.2.19"},{"ecosystem":"Maven","name":"org.springframework:spring-websocket","fixedVersion":null},{"ecosystem":"Maven","name":"org.springframework:spring-websocket","fixedVersion":null}],"fix":{"url":"https://github.com/spring-projects/spring-framework/commit/a42a6e0c6ac64eb18954729ca5e3fe64b05a39b5","label":"spring-projects/spring-framework@a42a6e0"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41838"},{"type":"WEB","url":"https://github.com/spring-projects/spring-framework/issues/36740"},{"type":"WEB","url":"https://github.com/spring-projects/spring-framework/commit/a42a6e0c6ac64eb18954729ca5e3fe64b05a39b5"},{"type":"WEB","url":"https://github.com/spring-projects/spring-framework/commit/bff98999056fc29b573ff47ad2433462eb52833c"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-framework"},{"type":"WEB","url":"https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19"},{"type":"WEB","url":"https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8"},{"type":"WEB","url":"https://spring.io/security/cve-2026-41838"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-29T18:16:34.978489898Z"}}