How severe is CVE-2026-20259?

CVE-2026-20259 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-20259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20259?

CVE-2026-20259 primarily affects Splunk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-20259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-20259 have an EU (EUVD) identifier?

Yes. CVE-2026-20259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36084.

When was CVE-2026-20259 published?

CVE-2026-20259 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-20259

CVE-2026-20259 is a medium-severity vulnerability in Splunk with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36084
Weakness: CWE-284
Affected product: Splunk
Published: 2026-06-10
Last modified: 2026-06-17

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.

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.
How severe is CVE-2026-20259?: CVE-2026-20259 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-20259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20259?: CVE-2026-20259 primarily affects Splunk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-20259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20259 have an EU (EUVD) identifier?: Yes. CVE-2026-20259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36084.
When was CVE-2026-20259 published?: CVE-2026-20259 was published on 2026-06-10 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*

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