CVE-2026-20258 Details
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 10.3.2512.11, 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.
A stored cross-site scripting vulnerability has been identified in Splunk Enterprise versions prior to 10.2.4, 10.0.7, 9.4.12, and 9.3.13, as well as in Splunk Cloud Platform versions prior to 10.3.2512.11, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132. This vulnerability allows low-privileged users, who do not have 'admin' or 'power' roles, to inject malicious scripts into classic dashboard HTML panels. The injected JavaScript can then execute in the browser of another user. Exploitation requires phishing the victim into triggering a request in their browser.
Users can upgrade to Splunk Enterprise versions 10.4.0, 10.2.4, 10.0.7, 9.4.12, and 9.3.13. For Splunk Cloud Platform, instances are actively monitored and patched. As an additional step, users can turn off Splunk Web or keep the 'dashboard_html_allow_embeddable_content' setting at its default value of 'false'.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://advisory.splunk.com/advisories/SVD-2026-0608 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| splunk splunk | >= 9.3.0, < 9.3.13 >= 9.4.0, < 9.4.12 >= 10.0.0, < 10.0.7 >= 10.2.0, < 10.2.4 |
CPE
Remediation
| |
| splunk splunk cloud platform | >= 9.3.2411, < 9.3.2411.132 >= 10.1.2507, < 10.1.2507.23 >= 10.2.2510, < 10.2.2510.15 >= 10.3.2512, < 10.3.2512.11 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 15, 2026 | Initial Analysis | [email protected] |
| Jun 10, 2026 | New CVE Received | [email protected] |