CVE-2026-20255 MEDIUM

CVE-2026-20255: Improper Input Validation through Classic Dashboards in Splunk Enterprise

Vendor Splunk
Product Splunk Enterprise
Weakness CWE-20 · Input validation
Published June 10, 2026
Last update June 10, 2026

CVSS base score

5.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 10, 2026 CVE published
June 10, 2026 Record updated