CVE record · CVE-2026-20204

Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise

CVSS 7.1 HighEPSS 0.031 · 87th percentile

Published by the CVE Program (CNA: cisco) at 15 Apr 2026, 15:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Splunk	Splunk Enterprise	affected 10.2 to before 10.2.1 custom affected 10.0 to before 10.0.5 custom affected 9.4 to before 9.4.10 custom affected 9.3 to before 9.3.11 custom
Splunk	Splunk Cloud Platform	affected 10.4.2603 to before Not Affected custom affected 10.3.2512 to before 10.3.2512.5 custom affected 10.2.2510 to before 10.2.2510.9 custom affected 10.1.2507 to before 10.1.2507.19 custom affected 10.0.2503 to before 10.0.2503.13 custom affected 9.3.2411 to before 9.3.2411.127 custom

Identifiers: CVE-2026-20204
CNA: cisco
Weakness (CWE): CWE-377
Tags: Splunk Enterprise
Splunk Cloud Platform
CWE-377
Published: 15 Apr 2026
Updated: 16 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.1	High	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	CNA (cisco)

CISA KEV Not listed.
EPSS 0.031, the 87th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

advisory.splunk.com/advisories/SVD-2026-0403

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.