{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20202","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.397Z","datePublished":"2026-04-15T15:17:43.871Z","dateUpdated":"2026-04-16T03:55:28.582Z"},"containers":{"cna":{"affected":[{"product":"Splunk Enterprise","vendor":"Splunk","versions":[{"version":"10.2","status":"affected","versionType":"custom","lessThan":"10.2.2"},{"version":"10.0","status":"affected","versionType":"custom","lessThan":"10.0.5"},{"version":"9.4","status":"affected","versionType":"custom","lessThan":"9.4.10"},{"version":"9.3","status":"affected","versionType":"custom","lessThan":"9.3.11"}]},{"product":"Splunk Cloud Platform","vendor":"Splunk","versions":[{"version":"10.4.2603","status":"affected","versionType":"custom","lessThan":"Not Affected"},{"version":"10.3.2512","status":"affected","versionType":"custom","lessThan":"10.3.2512.6"},{"version":"10.2.2510","status":"affected","versionType":"custom","lessThan":"10.2.2510.10"},{"version":"10.1.2507","status":"affected","versionType":"custom","lessThan":"10.1.2507.20"},{"version":"10.0.2503","status":"affected","versionType":"custom","lessThan":"10.0.2503.13"},{"version":"9.3.2411","status":"affected","versionType":"custom","lessThan":"9.3.2411.127"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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."}],"value":"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."}],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-0401"}],"title":"Improper Input Validation during User Account Creation in Splunk Enterprise","datePublic":"2026-04-15T00:00:00.000Z","metrics":[{"cvssV3_1":{"vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1","baseScore":6.6,"baseSeverity":"MEDIUM"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"cwe","description":"The software does not properly handle when an input contains Unicode encoding.","cweId":"CWE-176"}]}],"source":{"advisory":"SVD-2026-0401"},"credits":[{"lang":"en","value":"Ryan Luke<br><br>Mahfujur Rahman (mahfujwhh)"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-04-15T15:17:43.871Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-15T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-20202"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-16T03:55:28.582Z"}}]}}