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CVE-2026-20139 PUBLISHED CVSS 4.300000190734863 MEDIUM

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.8, 9.3.9, and 9.2.12, and Splunk Cloud Platform versions below 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, and 9.3.2411.121, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious payload into the `realname`, `tz`, or `email` parameters of the `/splunkd/__raw/services/authentication/users/username` REST API endpoint when they change a password. This could potentially lead to a client‑side denial‑of‑service (DoS). The malicious payload might significantly slow page load times or render Splunk Web temporarily unresponsive.

EPSS 0.06% · 18.4th percentile

Risk Scores

CVSS v3.1
4.300000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS Score
0.06%
18.4th percentile

Affected Products

VendorProductVersions
SplunkSplunk Enterprise10.0, 9.4, 9.3
splunksplunk9.2.0, 9.3.0, 9.4.0
splunksplunk_cloud_platform9.3.2411, 10.0.2503, 10.1.2507
SplunkSplunk Cloud Platform9.3.2411, 10.1.2507, 10.0.2503

Timeline

References

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