What’s Vulnerable › Vulnerabilities

CVE-2026-20163: Remote Command Execution (RCE) through the '/splunkd/__upload/indexing/preview' REST endpoint in Splunk Enterprise

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-11 · updated 2026-06-17
• Weakness: CWE-77

Description

In Splunk Enterprise versions below 10.2.0, 10.0.4, 9.4.9, and 9.3.10, and Splunk Cloud Platform versions below 10.2.2510.5, 10.0.2503.12, 10.1.2507.16, and 9.3.2411.124, a user who holds a role that contains the high-privilege capability `edit_cmd` could execute arbitrary shell commands using the `unarchive_cmd` parameter for the `/splunkd/__upload/indexing/preview` REST endpoint.

Affected products

• Splunk Enterprise: from 9.3.0 before 9.3.10; from 9.4.0 before 9.4.9; from 10.0.0 before 10.0.4 — fixed in 10.0.4, 9.3.10, 9.4.9
• Splunk Cloud Platform: from 9.3.2411 before 9.3.2411.124; from 10.0.2503 before 10.0.2503.12; from 10.1.2507 before 10.1.2507.16; from 10.2.2510 before 10.2.2510.5 — fixed in 10.0.2503.12, 10.1.2507.16, 10.2.2510.5, 9.3.2411.124

How to fix

Upgrade to a fixed version: Splunk Enterprise 10.0.4, 9.3.10, 9.4.9; Splunk Cloud Platform 10.0.2503.12, 10.1.2507.16, 10.2.2510.5, 9.3.2411.124. Check the vendor advisory for mitigations.

References

• https://advisory.splunk.com/advisories/SVD-2026-0302

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