How severe is CVE-2026-20138?

CVE-2026-20138 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-20138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20138?

CVE-2026-20138 affects Splunk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20138?

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

Does CVE-2026-20138 have an EU (EUVD) identifier?

Yes. CVE-2026-20138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7935.

When was CVE-2026-20138 published?

CVE-2026-20138 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2026-20138

CVE-2026-20138 is a medium-severity vulnerability in Splunk with a CVSS 3.x base score of 6.8. 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-532.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7935
Weakness: CWE-532
Affected product: Splunk
Published: 2026-02-18
Last modified: 2026-06-17

Description

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.7, 9.3.9, and 9.2.11, a user of a Splunk Search Head Cluster (SHC) deployment who holds a role with access to the Splunk `_internal` index could view the `integrationKey`, `secretKey`, and `appSecretKey` secrets, generated by [Duo Two-Factor Authentication for Splunk Enterprise](https://duo.com/docs/splunk), in plain text.

Frequently asked questions

What is CVE-2026-20138?: In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.7, 9.3.9, and 9.2.11, a user of a Splunk Search Head Cluster (SHC) deployment who holds a role with access to the Splunk `_internal` index could view the `integrationKey`, `secretKey`, and `appSecretKey` secrets, generated by [Duo Two-Factor Authentication for Splunk Enterprise](https://duo.com/docs/splunk), in plain text.
How severe is CVE-2026-20138?: CVE-2026-20138 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-20138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20138?: CVE-2026-20138 affects Splunk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20138 have an EU (EUVD) identifier?: Yes. CVE-2026-20138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7935.
When was CVE-2026-20138 published?: CVE-2026-20138 was published on 2026-02-18 and last updated on 2026-06-17.

References

https://advisory.splunk.com/advisories/SVD-2026-0203

Affected products (1)

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

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