Medium severity · published Oct 21, 2026
CVE-2026-76303
Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
New
5.7
CVSS
0.2%
EPSS
No
On KEV
Description
In Splunk SOAR versions below 8.7.0, a user that holds a role with the install_apps capability could store attacker-controlled content that Splunk SOAR displays in app documentation by installing an app. If another user who holds a role with permission to view apps opens the app documentation, Splunk SOAR could run that content in the browser of the user who opened the app documentation. With this access, the first user could access data and make changes that the user who opened the app documentation could make. The vulnerability is possible because Splunk SOAR does not sanitize app documentation content before it displays that content. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The user that holds a role with the install_apps capability should not be able to exploit the vulnerability at will. For more information see Manage roles and permissions in Splunk SOAR (On-premises) (https://help.splunk.com/en/splunk-soar/soar-on-premises/administer-soar-on-premises/7.1.0/manage-your-splunk-soar-on-premises-users-and-accounts/manage-roles-and-permissions-in-splunk-soar-on-premises) and Add and configure apps and assets to provide actions in Splunk SOAR (On-premises) (https://help.splunk.com/en/splunk-soar/soar-on-premises/administer-soar-on-premises/8.6.0/manage-your-splunk-soar-on-premises-apps-and-assets/add-and-configure-apps-and-assets-to-provide-actions-in-splunk-soar-on-premises) in the Splunk documentation.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
Splunk SOAR · Splunk
before 8.7.0 · source: vendor
Affected product
SS
Splunk SOAR
Splunk
More from Splunk SOAR
9.9
CVE-2026-76531
Files or Directories Accessible to External Parties in Splunk SOAR
8.8
CVE-2026-76530
Use of Non-Canonical URL Paths for Authorization Decisions in Splunk SOAR
8.8
CVE-2026-76526
Improper Neutralization in Splunk SOAR
8.1
CVE-2026-76356
Authentication Bypass through IP Address Spoofing in the Automation Broker in Splunk SOAR
7.6
CVE-2026-76357
Remote Code Execution (RCE) through Path Traversal in the REST API in Splunk SOAR