{"schema":"threatline.record/2","record":{"id":"CVE-2026-76277","aliases":[],"summary":"Improper Input Validation of Native Splunk Usernames through the REST API in Splunk Enterprise","details":"In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a user that holds a role with the edit_user capability could create a native Splunk username that ends with a period. The vulnerability is possible because username validation does not reject a trailing period before the username is used for a user directory. This can cause distinct native Splunk usernames to share per-user configuration data, and user-management operations can affect the wrong account or fail. For more information see Set up native Splunk authentication (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/use-the-native-splunk-platform-authentication-scheme/set-up-native-splunk-authentication) and Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.","categories":["Applications & CMS"],"product":"Splunk Enterprise","vendor":"Splunk","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","source_modified_at":"2026-10-08T15:06:09.743Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Splunk Enterprise","vendor":"Splunk","versions":[{"version":"10.4","status":"affected","versionType":"custom","lessThan":"10.4.3"},{"version":"10.2","status":"affected","versionType":"custom","lessThan":"10.2.7"},{"version":"10.0","status":"affected","versionType":"custom","lessThan":"10.0.10"},{"version":"9.4","status":"affected","versionType":"custom","lessThan":"9.4.15"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","source_modified_at":"2026-10-08T15:06:09.743Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Splunk Enterprise","ecosystem":null},"version":"10.4.3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","source_modified_at":"2026-10-08T15:06:09.743Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Splunk Enterprise","ecosystem":null},"version":"10.2.7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","source_modified_at":"2026-10-08T15:06:09.743Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Splunk Enterprise","ecosystem":null},"version":"10.0.10","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","source_modified_at":"2026-10-08T15:06:09.743Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Splunk Enterprise","ecosystem":null},"version":"9.4.15","basis":"first unaffected version stated in the CVE record"}],"cvss":4.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00183,"percentile":0.07493,"score_date":"2026-10-23"},"published_at":"2026-10-07T20:46:35.907Z","modified_at":"2026-10-08T15:06:09.743Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-76277","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-08T15:06:09.743Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-76277","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://advisory.splunk.com/advisories/SVD-2026-1001"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-08T15:05:55.710479Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-08T15:06:09.743Z","content_hash":"8104e5e073b0fc5d85ff653d1246bef39e9fb85c65d53c49586d0c4746a7e51e"}}