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PatchSiren cyber security CVE debrief

CVE-2026-20259 Splunk CVE debrief

A vulnerability exists 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.

Vendor
Splunk
Product
Splunk Enterprise
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-12
Advisory published
2026-06-10
Advisory updated
2026-06-12

Who should care

Administrators and users of Splunk Enterprise and Splunk Cloud Platform, especially those with high-privilege capabilities.

Technical summary

The vulnerability is caused by a lack of access control in the ownership reassignment endpoint. This allows a user with the `edit_saved_search_owner` capability to reassign saved search ownership to users outside their authorized scope.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade Splunk Enterprise to version 10.2.4 or later, or 10.0.7 or later.
  • Upgrade Splunk Cloud Platform to version 10.4.2604.0 or later, 10.3.2512.12 or later, 10.2.2510.15 or later, 10.1.2507.23 or later, 10.0.2503.14 or later, or 9.3.2411.131 or later.
  • Restrict the `edit_saved_search_owner` capability to authorized users.

Evidence notes

The CVSS score for this vulnerability is 5.5 (MEDIUM). The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-20259 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-20259

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-20259 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-20259

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.