{"id":"CVE-2026-20255","state":"PUBLISHED","title":"Improper Input Validation through Classic Dashboards in Splunk Enterprise","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 craft a malicious classic dashboard that exfiltrates sensitive data to an external server.  \n\nThe vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard.","publishedAt":"2026-06-10T17:16:00.962Z","updatedAt":"2026-06-10T18:25:12.492Z","severity":{"score":5.7,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","source":"cisco"},"assigner":"cisco","products":["Splunk Splunk Enterprise","Splunk Splunk Cloud Platform"],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.2","status":"affected","lessThan":"10.2.4","versionType":"custom"},{"version":"10.0","status":"affected","lessThan":"10.0.7","versionType":"custom"},{"version":"9.4","status":"affected","lessThan":"9.4.12","versionType":"custom"},{"version":"9.3","status":"affected","lessThan":"9.3.13","versionType":"custom"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.3.2512","status":"affected","lessThan":"10.3.2512.13","versionType":"custom"},{"version":"10.2.2510","status":"affected","lessThan":"10.2.2510.15","versionType":"custom"},{"version":"10.1.2507","status":"affected","lessThan":"10.1.2507.23","versionType":"custom"},{"version":"9.3.2411","status":"affected","lessThan":"9.3.2411.132","versionType":"custom"}]}],"references":["https://advisory.splunk.com/advisories/SVD-2026-0605"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20255.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20255","state":"PUBLISHED","datePublished":"2026-06-10T17:16:00.962Z","dateUpdated":"2026-06-10T18:25:12.492Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.401Z"},"containers":{"cna":{"title":"Improper Input Validation through Classic Dashboards in Splunk Enterprise","descriptions":[{"lang":"en","value":"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 craft a malicious classic dashboard that exfiltrates sensitive data to an external server.  \n\nThe vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard."}],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.2","status":"affected","lessThan":"10.2.4","versionType":"custom"},{"version":"10.0","status":"affected","lessThan":"10.0.7","versionType":"custom"},{"version":"9.4","status":"affected","lessThan":"9.4.12","versionType":"custom"},{"version":"9.3","status":"affected","lessThan":"9.3.13","versionType":"custom"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.3.2512","status":"affected","lessThan":"10.3.2512.13","versionType":"custom"},{"version":"10.2.2510","status":"affected","lessThan":"10.2.2510.15","versionType":"custom"},{"version":"10.1.2507","status":"affected","lessThan":"10.1.2507.23","versionType":"custom"},{"version":"9.3.2411","status":"affected","lessThan":"9.3.2411.132","versionType":"custom"}]}],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-0605"}],"metrics":[{"cvssV3_1":{"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","version":"3.1","baseScore":5.7,"baseSeverity":"MEDIUM"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","type":"cwe","description":"The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program."}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-06-10T17:16:00.962Z"},"datePublic":"2026-06-10T00:00:00.000Z","source":{"advisory":"SVD-2026-0605"},"credits":[{"lang":"en","value":"Tony Tong (tongster)"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-10T18:25:06.072954Z","id":"CVE-2026-20255","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-10T18:25:12.492Z"}}]}}}