{"cve":{"cve_id":"CVE-2026-20256","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00252,"epss_percentile":0.16265,"epss_as_of":"2026-06-23","description":"In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could cause data exfiltration through classic dashboards by redirecting a victim to an external site using a protocol-relative URL in a drill-down link.<br><br>The vulnerability exists because the URL classifier in classic dashboards only recognizes `http://` and `https://` schemes when checking for external URLs. Protocol-relative URLs such as `//attacker.com` bypass this check entirely, and Splunk Web does not show the external-navigation warning dialog to the victim.","published_at":"2026-06-10T17:15:55.966000Z","last_modified_at":null,"cvss_v3_score":5.7,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-20"],"nvd_references":["https://advisory.splunk.com/advisories/SVD-2026-0606"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:29:03.077147Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-cloud-platform","product_name":"Splunk Cloud Platform","version_start":"9.3.2411","version_start_inclusive":true,"version_end":"9.3.2411.132","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-cloud-platform:9.3.2411:9.3.2411.132"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-cloud-platform","product_name":"Splunk Cloud Platform","version_start":"10.3.2512","version_start_inclusive":true,"version_end":"10.3.2512.13","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-cloud-platform:10.3.2512:10.3.2512.13"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-cloud-platform","product_name":"Splunk Cloud Platform","version_start":"10.2.2510","version_start_inclusive":true,"version_end":"10.2.2510.15","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-cloud-platform:10.2.2510:10.2.2510.15"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-cloud-platform","product_name":"Splunk Cloud Platform","version_start":"10.1.2507","version_start_inclusive":true,"version_end":"10.1.2507.23","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-cloud-platform:10.1.2507:10.1.2507.23"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-enterprise","product_name":"Splunk Enterprise","version_start":"10.2","version_start_inclusive":true,"version_end":"10.2.4","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-enterprise:10.2:10.2.4"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-enterprise","product_name":"Splunk Enterprise","version_start":"10.0","version_start_inclusive":true,"version_end":"10.0.7","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-enterprise:10.0:10.0.7"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-enterprise","product_name":"Splunk Enterprise","version_start":"9.4","version_start_inclusive":true,"version_end":"9.4.12","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-enterprise:9.4:9.4.12"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"splunk-enterprise","product_name":"Splunk Enterprise","version_start":"9.3","version_start_inclusive":true,"version_end":"9.3.13","version_end_inclusive":false,"cpe23_uri":"cve5:splunk:splunk-enterprise:9.3:9.3.13"}],"exploit_refs":[],"news":[],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-0606","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-06-10T17:15:55.966000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:50:54.673227Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:50:54.673227Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:50:54.673227Z","label":"CVSS score revised","source":"cvelistv5"}]}