Medium severity · published Mar 11, 2026
CVE-2026-20166
Sensitive Information Disclosure in Discover Splunk Observability Cloud app for Splunk Enterprise
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Splunk Cloud Platform · Splunk
10.2.2510 before 10.2.2510.5; 10.1.2507 before 10.1.2507.16; 10.0.2503 before 10.0.2503.12 · source: vendor, NVD
SE
Splunk Enterprise · Splunk
10.2 before 10.2.1; 10.0 before 10.0.4 · source: vendor
SP
Splunk · Splunk
10.0.0 before 10.0.4; 10.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20166
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20166
Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2026-0305
More from Splunk Cloud Platform
9.1
CVE-2022-32151
The httplib and urllib Python libraries that Splunk shipped with Splunk Enterprise did not validate certificates using the certificate authority (CA) certificate stores by default…
8.8
CVE-2026-20251
Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
8.8
CVE-2025-20371
In Splunk Enterprise versions below 10.0.1, 9.4.4, 9.3.6 and 9.2.8, and Splunk Cloud Platform versions below 9.3.2411.109, 9.3.2408.119 and 9.2.2406.122, an unauthenticated…
8.8
CVE-2024-36983
In Splunk Enterprise versions below 9.2.2, 9.1.5, and 9.0.10 and Splunk Cloud Platform versions below 9.1.2312.109 and 9.1.2308.207, an authenticated user could create an external…
8.8
CVE-2023-40598
In Splunk Enterprise versions below 8.2.12, 9.0.6, and 9.1.1, an attacker can create an external lookup that calls a legacy internal function