{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20253","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.401Z","datePublished":"2026-06-10T17:16:21.242Z","dateUpdated":"2026-06-11T10:17:13.366Z"},"containers":{"cna":{"affected":[{"product":"Splunk Enterprise","vendor":"Splunk","versions":[{"version":"10.2","status":"affected","versionType":"custom","lessThan":"10.2.4"},{"version":"10.0","status":"affected","versionType":"custom","lessThan":"10.0.7"}]},{"product":"Splunk Cloud Platform","vendor":"Splunk","versions":[{"version":"10.4.2604","status":"affected","versionType":"custom","lessThan":"10.4.2604.3"},{"version":"10.2.2510","status":"affected","versionType":"custom","lessThan":"10.2.2510.14"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.3 and 10.2.2510.14, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.<br><br>The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials."}],"value":"In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.3 and 10.2.2510.14, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.<br><br>The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials."}],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-0603"}],"title":"Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise","datePublic":"2026-06-10T00:00:00.000Z","metrics":[{"cvssV3_1":{"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1","baseScore":9.8,"baseSeverity":"CRITICAL"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"cwe","description":"The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.","cweId":"CWE-306"}]}],"source":{"advisory":"SVD-2026-0603"},"credits":[{"lang":"en","value":"Alex Hordijk (hordalex)"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-06-10T17:16:21.242Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-11T03:55:41.348880Z","id":"CVE-2026-20253","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-06-11T10:17:13.366Z"}}]}}