Splunk Enterprise <10.2.4/10.0.7/9.4.12 LowPriv Exfil via Malicious Dashboard
CVE-2026-20255 Published on June 10, 2026
Improper Input Validation through Classic Dashboards in Splunk Enterprise
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.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-20255
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Affected Versions
Splunk Enterprise:- Version 10.2 and below 10.2.4 is affected.
- Version 10.0 and below 10.0.7 is affected.
- Version 9.4 and below 9.4.12 is affected.
- Version 9.3 and below 9.3.13 is affected.
- Version 10.3.2512 and below 10.3.2512.13 is affected.
- Version 10.2.2510 and below 10.2.2510.15 is affected.
- Version 10.1.2507 and below 10.1.2507.23 is affected.
- Version 9.3.2411 and below 9.3.2411.132 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.