{"schemaVersion":3,"id":"CVE-2026-20202","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.<br><br>This could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users.","dates":{"published":"2026-04-15T15:17:43.871Z","modified":"2026-04-16T03:55:28.582Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.6,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.6,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.6,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00246,"percentile":0.14907,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00246},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00246,"percentile":0.14907}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00246,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00246,"percentile":0.14907}]},"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-176","name":"Improper Handling of Unicode Encoding","description":"The product does not properly handle when an input contains Unicode encoding.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/176.html"}],"affected":[{"vendor":"splunk","product":"splunk","name":"splunk","label":"splunk","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 9.3.0, < 9.3.11","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.4.0, < 9.4.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0.0, < 10.0.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.2.0, < 10.2.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 9.3.0, < 9.3.11 | ≥ 9.4.0, < 9.4.10 | ≥ 10.0.0, < 10.0.5 | ≥ 10.2.0, < 10.2.2","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"splunk","label":"Splunk","category":"server-app"}},"hubHref":"/vendor/splunk/splunk"},{"vendor":"splunk","product":"splunk_cloud_platform","name":"splunk cloud platform","label":"splunk_cloud_platform","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 10.4.2603, < Not Affected","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.3.2411, < 9.3.2411.127","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0.2503, < 10.0.2503.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.1.2507, < 10.1.2507.20","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.2.2510, < 10.2.2510.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.3.2512, < 10.3.2512.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 10.4.2603, < Not Affected | ≥ 9.3.2411, < 9.3.2411.127 | ≥ 10.0.2503, < 10.0.2503.13 | ≥ 10.1.2507, < 10.1.2507.20 | ≥ 10.2.2510, < 10.2.2510.10 | ≥ 10.3.2512, < 10.3.2512.6","eol":null,"hubHref":"/vendor/splunk/splunk_cloud_platform"},{"vendor":"splunk","product":"splunk enterprise","name":"Splunk Enterprise","label":"splunk enterprise","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 10.2, < 10.2.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0, < 10.0.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.4, < 9.4.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.3, < 9.3.11","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 10.2, < 10.2.2 | ≥ 10.0, < 10.0.5 | ≥ 9.4, < 9.4.10 | ≥ 9.3, < 9.3.11","eol":null,"hubHref":"/vendor/splunk/splunk_enterprise"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-0401","label":"advisory.splunk.com/advisories/SVD-2026-0401","hostname":"advisory.splunk.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-04-15T15:17:43.871Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-16T03:55:28.582Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T17:06:10.521Z","stale":false,"partial":false}}