{"schemaVersion":3,"id":"CVE-2026-41838","aliases":["UBUNTU-CVE-2026-41838","DEBIAN-CVE-2026-41838","GHSA-q723-847q-5g8g"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-06-09T03:49:15.933Z","modified":"2026-06-27T20:57:50.695Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Maven","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","exploitability":3.1,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00295,"percentile":0.20761,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.124,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00171},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00295,"percentile":0.20761}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00295,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00295,"percentile":0.20761}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-330","name":"Use of Insufficiently Random Values","description":"The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/330.html"}],"affected":[{"vendor":"debian","product":"libspring-java","name":"libspring-java","label":"libspring-java","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libspring-java","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libspring-java","name":"libspring-java","label":"libspring-java","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libspring-java","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"org.springframework","product":"spring-websocket","name":"org.springframework:spring-websocket","label":"spring-websocket","ecosystem":"Maven","cpePart":null,"purl":"pkg:maven/org.springframework/spring-websocket","purlType":"maven","versions":[{"text":"≥ 7.0.0, < 7.0.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, < 6.2.19","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.1.0, ≤ 6.1.27","noFixRecorded":false,"fixedIn":null},{"text":"≤ 5.3.48","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.0.0, < 7.0.8 | ≥ 6.2.0, < 6.2.19 | ≥ 6.1.0, ≤ 6.1.27 | ≤ 5.3.48","eol":{"isEol":null,"eolDate":null,"matchMethod":"purl","cycle":null,"product":{"name":"spring-framework","label":"Spring Framework","category":"framework"}},"hubHref":null},{"vendor":"spring","product":"spring framework","name":"Spring Framework","label":"spring framework","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 7.0.0, < 7.0.7.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, < 6.2.18.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.1.0, < 6.1.28","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.3.0, < 5.3.49","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.0.0, < 7.0.7.1 | ≥ 6.2.0, < 6.2.18.1 | ≥ 6.1.0, < 6.1.28 | ≥ 5.3.0, < 5.3.49","eol":null,"hubHref":"/vendor/spring/spring_framework"},{"vendor":"vmware","product":"spring_framework","name":"Spring Framework","label":"spring_framework","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 5.3.0, < 5.3.49","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.1.0, < 6.1.28","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, < 6.2.18.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.0.0, < 7.0.7.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 5.3.0, < 5.3.49 | ≥ 6.1.0, < 6.1.28 | ≥ 6.2.0, < 6.2.18.1 | ≥ 7.0.0, < 7.0.7.1","eol":null,"hubHref":"/vendor/vmware/spring_framework"}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://spring.io/security/cve-2026-41838","label":"spring.io/security/cve-2026-41838","hostname":"spring.io","tags":["REPORT","WEB","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-41838","label":"ubuntu.com/security/CVE-2026-41838","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-41838","label":"www.cve.org/CVERecord?id=CVE-2026-41838","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-41838","label":"security-tracker.debian.org/tracker/CVE-2026-41838","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41838","label":"nvd.nist.gov/vuln/detail/CVE-2026-41838","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/spring-projects/spring-framework/issues/36740","label":"github.com/spring-projects/spring-framework/issues/36740","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/spring-projects/spring-framework/commit/a42a6e0c6ac64eb18954729ca5e3fe64b05a39b5","label":"github.com/spring-projects/spring-framework/commit/a42a6e0c6ac64eb18954729ca5e3fe64b05a39b5","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/spring-projects/spring-framework/commit/bff98999056fc29b573ff47ad2433462eb52833c","label":"github.com/spring-projects/spring-framework/commit/bff98999056fc29b573ff47ad2433462eb52833c","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/spring-projects/spring-framework","label":"github.com/spring-projects/spring-framework","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19","label":"github.com/spring-projects/spring-framework/releases/tag/v6.2.19","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8","label":"github.com/spring-projects/spring-framework/releases/tag/v7.0.8","hostname":"github.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-09T03:49:15.933Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-27T20:57:50.695Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T22:20:49.021Z","stale":false,"partial":false}}