CVE-2026-20259

Description

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

EPSS — Exploit Prediction

0.0019

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
splunk	splunk	10.0.0 — 10.0.7
splunk	splunk	10.2.0 — 10.2.4
splunk	splunk_cloud_platform	9.3.2411 — 9.3.2411.131
splunk	splunk_cloud_platform	10.0.2503 — 10.0.2503.14
splunk	splunk_cloud_platform	10.1.2507 — 10.1.2507.23
splunk	splunk_cloud_platform	10.2.2510 — 10.2.2510.15
splunk	splunk_cloud_platform	10.3.2512 — 10.3.2512.12

References

Advisories & Patches

https://advisory.splunk.com/advisories/SVD-2026-0609

Frequently Asked Questions

What is CVE-2026-20259? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-20259? +

CVE-2026-20259 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0019, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-20259? +

CVE-2026-20259 affects products from splunk, specifically: splunk, splunk_cloud_platform. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-20259? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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