Description
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who holds the "power" Splunk role could store a Dashboard Studio workflow action with a crafted Uniform Resource Locator (URL). When another authenticated user selects the stored action from Event Actions and selects Continue, attacker-controlled JavaScript runs in the browser of that user. This could expose data or actions available through Splunk Web to that user. The vulnerability is possible because Dashboard Studio does not sufficiently validate workflow-action URLs before processing them. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The user who holds the "power" Splunk role should not be able to exploit the vulnerability at will. For more information see Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.
Published: 2026-08-19
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

In Splunk Enterprise versions older than 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user with the "power" role can store a Dashboard Studio workflow action containing a crafted URL; when any authenticated user later selects that stored action and clicks Continue, the embedded JavaScript runs in the victim’s browser, exposing data or actions available through Splunk Web, thereby presenting a stored cross‑site scripting flaw that can lead to disclosure of sensitive information and execution of arbitrary client‑side code.

Affected Systems

The vulnerable product is Splunk Enterprise from the vendor Splunk; affected versions are those below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and the flaw requires the presence of Splunk Web and a user holding the "power" role to create the malicious action.

Risk and Exploitability

The CVSS score of 7.1 indicates high severity for confidentiality, integrity, and availability of the browser context; the EPSS score is not available and the issue is not listed in the CISA KEV catalog. Exploitation requires phishing or social engineering to get an authenticated user to trigger the vulnerable action, and does not provide remote code execution on the server but enables potent client‑side capabilities that could be leveraged for further credential theft or session hijacking.

Generated by OpenCVE AI on August 20, 2026 at 09:51 UTC.

Remediation

Vendor Solution

Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, and 9.4.14, or higher.


Vendor Workaround

The vulnerability affects instances with Splunk Web turned on. Turning Splunk Web off is a possible workaround. See [Disable unnecessary Splunk Enterprise components](https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/install-splunk-enterprise-securely/disable-unnecessary-splunk-enterprise-components) and the [web.conf](https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.2/configuration-file-reference/10.2.0-configuration-file-reference/web.conf) configuration specification file for more information on turning off Splunk Web.


OpenCVE Recommended Actions

  • Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, 9.4.14, or newer
  • Disable Splunk Web to remove the vulnerable entry point if an upgrade is not immediately possible
  • Restrict the creation of Dashboard Studio workflow actions to trusted users and audit existing actions for malicious URLs

Generated by OpenCVE AI on August 20, 2026 at 09:51 UTC.

Tracking

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Advisories

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History

Wed, 26 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 21 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Splunk splunk
CPEs cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*
Vendors & Products Splunk splunk

Wed, 19 Aug 2026 23:15:00 +0000

Type Values Removed Values Added
First Time appeared Splunk
Splunk splunk Enterprise
Vendors & Products Splunk
Splunk splunk Enterprise

Wed, 19 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
Description In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who holds the "power" Splunk role could store a Dashboard Studio workflow action with a crafted Uniform Resource Locator (URL). When another authenticated user selects the stored action from Event Actions and selects Continue, attacker-controlled JavaScript runs in the browser of that user. This could expose data or actions available through Splunk Web to that user. The vulnerability is possible because Dashboard Studio does not sufficiently validate workflow-action URLs before processing them. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The user who holds the "power" Splunk role should not be able to exploit the vulnerability at will. For more information see Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.
Title Stored Cross-Site Scripting (XSS) through Dashboard Studio Workflow Actions in Splunk Enterprise
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Splunk Splunk Splunk Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-08-26T15:22:05.626Z

Reserved: 2026-08-19T12:02:03.627Z

Link: CVE-2026-76333

cve-icon Vulnrichment

Updated: 2026-08-26T15:17:00.609Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-19T22:17:17.673

Modified: 2026-08-26T16:16:40.127

Link: CVE-2026-76333

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-20T10:00:07Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')