Vulnerability · Published Jun 10, 2026 · Assigned by cisco
CVE-2026-20255Improper Input Validation through Classic Dashboards in Splunk Enterprise
Medium 5.7
In plain English
A medium-severity improper input validation in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official 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. 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.2 – before 10.2.410.0 – before 10.0.79.4 – before 9.4.129.3 – before 9.3.13 |
| Splunk | Splunk Cloud Platform | 10.3.2512 – before 10.3.2512.1310.2.2510 – before 10.2.2510.1510.1.2507 – before 10.1.2507.239.3.2411 – before 9.3.2411.132 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N