What is CVE-2026-20142?

CVE-2026-20142 is a medium-severity vulnerability in Splunk, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.8/10. Published 2026-02-18.

How severe is CVE-2026-20142?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Information disclosure in Splunk

CVE-2026-20142

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 RSA `accessKey` value from the [<u>Authentication.conf</u> ](https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.2/configuration-file-reference/10.2.0-configuration-file-reference/authentication.conf)file, in plain text.

EPSS: 0.003 (23.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Splunk
Splunk Enterprise — versions 10.0, 9.4, 9.3

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20142?: CVE-2026-20142 is a medium-severity vulnerability in Splunk, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.8/10. Published 2026-02-18.
How severe is CVE-2026-20142?: Medium severity. CVSS v3 base score is 6.8 out of 10.