CVE-2026-20204
Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise
Description
In Splunk Enterprise versions below 10.2.1, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles could potentially perform a Remote Code Execution (RCE) by uploading a malicious file to the `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory.
INFO
Published Date :
April 15, 2026, 4:16 p.m.
Last Modified :
April 17, 2026, 7:04 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-20204
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | d1c1063e-7a18-46af-9102-31f8928bc633 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Splunk Enterprise to a minimum version of 10.2.1, 10.0.5, 9.4.10, or 9.3.11.
- Update Splunk Cloud Platform to a minimum version of 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, or 9.3.2411.127.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20204.
| URL | Resource |
|---|---|
| https://advisory.splunk.com/advisories/SVD-2026-0403 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20204 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20204
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20204 vulnerability anywhere in the article.
-
CybersecurityNews
Splunk Enterprise and Cloud Platform Vulnerability Enables Remote Code Execution Attacks
A critical security vulnerability has been officially disclosed, affecting multiple versions of Enterprise and Cloud platforms. Tracked as CVE-2026-20204, this high-severity flaw carries a CVSS score ... Read more
-
Daily CyberSecurity
Critical 9.8 Webex Flaw Lets Attackers Impersonate Any User
In the modern enterprise, the Single Sign-On (SSO) portal is the master key to a company’s digital life. However, a recently disclosed critical vulnerability in Cisco Webex Services has revealed how a ... Read more
-
Daily CyberSecurity
Chrome 147 Update: Google Patches Critical $90,000 ANGLE Flaw and 30 Other Security Gaps
Google has begun rolling out a high-stakes update for the Chrome stable channel, addressing a total of 31 security vulnerabilities, including five rated as Critical. The release, version 147.0.7727.10 ... Read more
The following table lists the changes that have been made to the
CVE-2026-20204 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 17, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:splunk:splunk:10.2.0:*:*:*:enterprise:*:*:* *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.5 *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.3.0 up to (excluding) 9.3.11 *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.4.0 up to (excluding) 9.4.10 Added CPE Configuration OR *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.0.2503 up to (excluding) 10.0.2503.13 *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 9.3.2411 up to (excluding) 9.3.2411.127 *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.1.2507 up to (excluding) 10.1.2507.19 *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.2.2510 up to (excluding) 10.2.2510.9 *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.3.2512 up to (excluding) 10.3.2512.5 Added Reference Type Cisco Systems, Inc.: https://advisory.splunk.com/advisories/SVD-2026-0403 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 15, 2026
Action Type Old Value New Value Added Description In Splunk Enterprise versions below 10.2.1, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles could potentially perform a Remote Code Execution (RCE) by uploading a malicious file to the `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-377 Added Reference https://advisory.splunk.com/advisories/SVD-2026-0403