CVE-2026-20255

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.

Score

CVSS 3.1 5.7 Medium

Status

Analyzed - psirt@cisco.com

Published

2026-06-10

Last modified

2026-06-10

Weaknesses

CWE-20

Affected products

• Splunk (Splunk)
• Splunk Cloud Platform (Splunk)
• Splunk Enterprise (Splunk)

References

• https://advisory.splunk.com/advisories/SVD-2026-0605