CVE-2026-20240
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
In Splunk Enterprise before versions 10.2.2, 10.0.5, 9.4.11, 9.3.12 and Splunk Cloud Platform before specified versions, a low-privileged user (without admin or power roles) can cause a denial of service (DoS) by exploiting the coldToFrozen.sh script in the splunk_archiver app to rename critical Splunk directories, making the instance non-functional.
Risk Assessment
This vulnerability allows an unprivileged user to disable a Splunk instance, potentially leading to disruptions in monitoring and data analysis services, impacting business continuity.
Recommendation
It is recommended to upgrade Splunk Enterprise to versions 10.2.2, 10.0.5, 9.4.11, or 9.3.12 (or later) and Splunk Cloud Platform to the appropriate versions listed in the description.
Other vulnerabilities in Splunk
See all- CVE-2013-7394High
The 'runshellscript echo.sh' script in Splunk before version 5.0.5 allows remote authenticated users to execute arbitrary commands via a crafted string.
- CVE-2026-20298Medium
In Splunk Enterprise and Splunk Cloud Platform, a vulnerability allows a low-privileged user (without 'admin' or 'power' roles) to view stored credential hashes. This occurs when the user accesses the `/servicesNS/-/-/storage/passwords` REST endpoint via the `|rest` SPL command, which returns the `encr_password` field.
- CVE-2026-20297High
In Splunk Enterprise and Splunk Cloud Platform, a path traversal vulnerability exists in the app installation workflow. A user with `edit_local_apps` and `install_apps` capabilities can write files outside the intended app directory into `$SPLUNK_HOME/etc/` and its subdirectories.
- CVE-2026-20296High
In Splunk Enterprise and Splunk Cloud Platform, a CSRF vulnerability allows an attacker to trick a user with appropriate privileges into executing arbitrary SPL searches as the splunk-system-user. The issue is due to missing CSRF token validation on GET requests in Deployment Server endpoints and improper input neutralization before inclusion in an SPL search.
- CVE-2026-20239High
Vulnerability in Splunk Enterprise (versions below 10.2.2 and 10.0.5) and Splunk Cloud Platform (multiple versions) allows users with access to the _internal index to view session cookies and response bodies containing sensitive data.
Original NVD description (English source)
In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS