Splunk Enterprise and Cloud Platform
CVE-2026-20258: Stored Cross-Site Scripting (XSS) through Classic Dashboard in Splunk Enterprise
In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.11, 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 store a malicious script in a classic dashboard HTML panel, causing unauthorized JavaScript code to execute in the browser of another user.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Splunk Enterprise 10.2 | 10.2.4 or later |
| Splunk Enterprise 10.0 | 10.0.7 or later |
| Splunk Enterprise 9.4 | 9.4.12 or later |
| Splunk Enterprise 9.3 | 9.3.13 or later |
| Splunk Cloud Platform 10.3 | 10.3.2512.11 or later |
| Splunk Cloud Platform 10.2 | 10.2.2510.15 or later |
| Splunk Cloud Platform 10.1 | 10.1.2507.23 or later |
| Splunk Cloud Platform 9.3 | 9.3.2411.132 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.11, 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 store a malicious script in a classic dashboard HTML panel, causing unauthorized JavaScript code to execute in the browser of another user.
The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The low-privileged user should not be able to exploit the vulnerability at will.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.