Access Control Weakness in Splunk Enterprise and Splunk Cloud Platform
CVE-2026-20166

5.4MEDIUM

Key Information:

Vendor

Splunk
Status
Splunk Enterprise
Splunk Cloud Platform
Vendor
CVE Published:
11 March 2026

What is CVE-2026-20166?

In certain versions of Splunk Enterprise and Splunk Cloud Platform, a low-privileged user can exploit an improper access control issue in the Discover Splunk Observability Cloud app. Users without 'admin' or 'power' roles have the potential to obtain the Observability Cloud API access token, compromising the security of sensitive data. Importantly, this vulnerability does not impact earlier versions of Splunk Enterprise prior to 9.4.9 and 9.3.10, as those versions do not include the vulnerable app.

Affected Version(s)

Splunk Cloud Platform 10.2.2510 < 10.2.2510.5

Splunk Cloud Platform 10.1.2507 < 10.1.2507.16

Splunk Cloud Platform 10.0.2503 < 10.0.2503.12

References

https://advisory.splunk.com/advisories/SVD-2026-0305

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Will Zgoda, Splunk
.