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Splunk Enterprise CVE-2026-20259

| EUVDEUVD-2026-36084 MEDIUM
Improper Access Control (CWE-284)
2026-06-10 cisco GHSA-jhf8-vwfv-vr95
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

Lifecycle Timeline

2
Patch available
Jun 10, 2026 - 20:01 EUVD
Analysis Generated
Jun 10, 2026 - 19:01 vuln.today

DescriptionNVD

In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.0, 10.3.2512.12, 10.2.2510.15, 10.1.2507.23, 10.0.2503.14, and 9.3.2411.131, a user who holds a Splunk role that contains the high-privilege capability edit_saved_search_owner could reassign saved search ownership to users outside their authorized scope. The ownership reassignment endpoint lacks access control.

AnalysisAI

Improper access control on the saved search ownership reassignment endpoint in Splunk Enterprise and Splunk Cloud Platform allows a highly privileged authenticated user - one whose role contains the edit_saved_search_owner capability - to reassign saved search ownership to users outside their authorized scope. Affected versions span Splunk Enterprise below 10.2.4 and 10.0.7, and multiple Splunk Cloud Platform branches below their respective fixed builds. No public exploit has been identified at time of analysis, and the PR:H CVSS requirement confines risk primarily to insider threats or scenarios involving compromised privileged Splunk accounts.

Technical ContextAI

The vulnerability is rooted in CWE-284 (Improper Access Control), where the API endpoint responsible for reassigning saved search ownership in Splunk fails to enforce authorization scope boundaries. Splunk's role-based access control model grants specific capabilities to roles; the edit_saved_search_owner capability is designated high-privilege and enables modification of saved search ownership metadata. The flaw is that while the capability gate controls who can invoke the endpoint, no secondary check validates whether the target reassignment user falls within the invoking user's permitted scope. Both Splunk Enterprise (CPE: cpe:2.3:a:splunk:splunk_enterprise) and Splunk Cloud Platform (CPE: cpe:2.3:a:splunk:splunk_cloud_platform) share this endpoint logic and are affected across a broad range of versions. The CVSS vector AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N confirms this is a network-accessible, low-complexity flaw with high confidentiality impact once the privilege threshold is met.

RemediationAI

Upgrade Splunk Enterprise to version 10.2.4 or 10.0.7 (the fixed releases per the vendor advisory SVD-2026-0609 at https://advisory.splunk.com/advisories/SVD-2026-0609). For Splunk Cloud Platform, upgrade to the fixed build corresponding to your active branch: 10.4.2604.0, 10.3.2512.12, 10.2.2510.15, 10.1.2507.23, 10.0.2503.14, or 9.3.2411.131. As a compensating control where immediate patching is not possible, audit all Splunk roles that contain the edit_saved_search_owner capability and remove it from any role where it is not operationally required - this directly eliminates the attack surface by reducing the population of users who can invoke the vulnerable endpoint. Note that removing the capability may affect legitimate ownership management workflows and should be coordinated with Splunk administrators. No additional workaround details were provided in the vendor advisory at time of analysis.

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CVE-2026-20259 vulnerability details – vuln.today

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