Information disclosure in Splunk
CVE-2026-20166
In Splunk Enterprise versions below 10.2.1 and 10.0.4, and Splunk Cloud Platform versions below 10.2.2510.5, 10.1.2507.16, and 10.0.2503.12, a low-privileged user that does not hold the "admin" or "power" Splunk roles could retrieve the Observability Cloud API access token through the Discover Splunk Observability Cloud app due to improper access control. This vulnerability does not affect Splunk Enterprise versions below 9.4.9 and 9.3.10 because the Discover Splunk Observability Cloud app does not come with Splunk Enterprise.
Vulnerability class: Information Disclosure
EPSS: 0.002 (5.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Splunk — versions 10.2.0
- Splunk Cloud Platform — versions 10.2.2510, 10.1.2507, 10.0.2503
- Splunk Splunk_cloud_platform
- Splunk Enterprise — versions 10.2, 10.0
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20166?
- CVE-2026-20166 is a medium-severity vulnerability in Splunk, classified under Information Disclosure. CVSS score: 5.4/10. Published 2026-03-11.
- How severe is CVE-2026-20166?
- Medium severity. CVSS v3 base score is 5.4 out of 10.