CVE-2026-76303CWE-79cross-site-scripting

CVE-2026-76303

Medium · published October 22, 2026

CVSS v3.1
5.7
EPSS
0%
Percentile
6.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00176 · 6.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-22T03:17Z
References (1)
EPSS history
Timeline
  • 23 OCT 04:07Z
    EPSS moved — → 0%
    epss
  • 21 OCT 22:52Z
    Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
    cvelistv5
  • 21 OCT 22:52Z
    Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
    cvelistv5