CVE-2026-20255
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. 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.
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)