{"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": "2026-04-15T18:44:38.717Z"}, "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": "2026-04-15T18:44:31.460792Z", "id": "CVE-2026-20202", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-15T18:44:38.717Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-20202", "lastModified": "2026-04-15T16:16:34.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.7, "impactScore": 5.9, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2026-04-15T16:16:34.120", "references": [{"source": "psirt@cisco.com", "url": "https://advisory.splunk.com/advisories/SVD-2026-0401"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-176"}], "source": "psirt@cisco.com", "type": "Primary"}]}

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