CVE-2026-76303 Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-76303?
CVE-2026-76303 is a medium-severity vulnerability in Splunk SOAR, published on 21 Oct 2026.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-76303?
How do I fix CVE-2026-76303?
No fix has been published for CVE-2026-76303 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76303 being exploited?
There is no known exploitation of CVE-2026-76303 in the wild and no public exploit code.
Sources
Also known as GHSA-mr43-r8rx-5q4q.