Splunk Enterprise/Cloud Platform prior 10.0.4/10.2.1 Observability Cloud API information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Splunk Enterprise and Cloud Platform. It has been classified as problematic. The impacted element is an unknown function of the component Observability Cloud API. This manipulation causes information disclosure. This vulnerability is tracked as CVE-2026-20166. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Splunk Enterprise and Cloud Platform. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Observability Cloud API. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at advisory.splunk.com. This vulnerability is known as CVE-2026-20166 since 10/08/2025. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 301871 (Splunk Enterprise 10.0.0 < 10.0.4, 10.2.0 < 10.2.1 (SVD-2026-0305)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.0.4 or 10.2.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (301871). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301871
Nessus Name: Splunk Enterprise 10.0.0 < 10.0.4, 10.2.0 < 10.2.1 (SVD-2026-0305)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Enterprise/Cloud Platform 10.0.4/10.2.1

Timelineinfo

10/08/2025 CVE reserved
03/11/2026 +154 days Advisory disclosed
03/11/2026 +0 days VulDB entry created
03/14/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: SVD-2026-0305
Status: Confirmed

CVE: CVE-2026-20166 (🔒)
GCVE (CVE): GCVE-0-2026-20166
GCVE (VulDB): GCVE-100-350467

Entryinfo

Created: 03/11/2026 17:44
Updated: 03/14/2026 15:55
Changes: 03/11/2026 17:44 (65), 03/12/2026 06:33 (2), 03/14/2026 15:55 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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