CVE-2026-20254 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 10.3.2512.13, 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 when a higher-privileged user views it, bypassing the external content restriction through a Cascading Style Sheets (CSS) injection.<br><br>The Trusted Domains security check does not fully validate inline style attribute values, which can allow for outbound requests to untrusted domains and credential exfiltration when a victim views a crafted dashboard.
A vulnerability exists 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 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132. The issue allows low-privileged users, who do not have 'admin' or 'power' roles, to create malicious classic dashboards that exfiltrate sensitive data to external servers. This occurs when a higher-privileged user views the dashboard, effectively bypassing external content restrictions through a Cascading Style Sheets (CSS) injection. The vulnerability arises because the Trusted Domains security check does not properly validate inline style attribute values, enabling outbound requests to untrusted domains and the potential for credential exfiltration.
Users are advised to upgrade Splunk Enterprise to versions 10.4.0, 10.2.4, 10.0.7, 9.4.12, or 9.3.13. For Splunk Cloud Platform, instances are actively monitored and patched by Splunk.
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-2026-0604 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [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, < 10.3.2512.13 |
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] |