{"timestamp":"2026-06-10T18:25:06.072954Z","id":"CVE-2026-20255","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.2","lessThan":"10.2.4","versionType":"custom","status":"affected"},{"version":"10.0","lessThan":"10.0.7","versionType":"custom","status":"affected"},{"version":"9.4","lessThan":"9.4.12","versionType":"custom","status":"affected"},{"version":"9.3","lessThan":"9.3.13","versionType":"custom","status":"affected"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.3.2512","lessThan":"10.3.2512.13","versionType":"custom","status":"affected"},{"version":"10.2.2510","lessThan":"10.2.2510.15","versionType":"custom","status":"affected"},{"version":"10.1.2507","lessThan":"10.1.2507.23","versionType":"custom","status":"affected"},{"version":"9.3.2411","lessThan":"9.3.2411.132","versionType":"custom","status":"affected"}]}]

OR
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.7
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.2.0 up to (excluding) 10.2.4
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.3.0 up to (excluding) 9.3.13
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.4.0 up to (excluding) 9.4.12

OR
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 9.3.2411 up to (excluding) 9.3.2411.132
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.1.2507 up to (excluding) 10.1.2507.23
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.2.2510 up to (excluding) 10.2.2510.15
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.3.2512 up to (excluding) 10.3.2512.13

Cisco Systems, Inc.: https://advisory.splunk.com/advisories/SVD-2026-0605 Types: Vendor Advisory

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.  

The 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.

AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CWE-20

https://advisory.splunk.com/advisories/SVD-2026-0605