CVE-2026-20254
MEDIUM WAF: Medium
CVSS 5.7
Published: 2026-06-10
CWE-20
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.
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.
WAF Coverage Analysis
Improper Input Validation
Medium WAF Coverage
OWASP: A03:2021 Injection
920xxx - Protocol Enforcement 941xxx - XSS / XXE 942xxx - SQL Injection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| splunk | splunk | 9.3.0 - 9.3.13 |
| splunk | splunk | 9.4.0 - 9.4.12 |
| splunk | splunk | 10.0.0 - 10.0.7 |
| splunk | splunk | 10.2.0 - 10.2.4 |
| splunk | splunk_cloud_platform | 9.3.2411 - 9.3.2411.132 |
| splunk | splunk_cloud_platform | 10.1.2507 - 10.1.2507.23 |
| splunk | splunk_cloud_platform | 10.2.2510 - 10.2.2510.15 |
| splunk | splunk_cloud_platform | 10.3.2512 - 10.3.2512.13 |
References
- advisory.splunk.com (Vendor Advisory)