CVE-2026-76252
MediumCVSS 6.8Summary
In Splunk Enterprise below 10.4.2, 10.2.6, 10.0.9, and 9.4.13, an unauthenticated user who tricks another user into visiting a malicious web page could run unauthorized JavaScript in that user's browser. The XSS is possible because Splunk Web does not validate the origin and source of messages received by a page message handler. The attack requires phishing the victim.
Risk Assessment
An attacker could gain unauthorized access to the victim's data and perform actions affecting system integrity, potentially leading to confidentiality and integrity breaches.
Recommendation
Upgrade Splunk Enterprise to version 10.4.2, 10.2.6, 10.0.9, or 9.4.13 or later. Educate users about phishing and apply browser security measures.
Original NVD description (English source)
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.13, an unauthenticated user who tricks another user into visiting a malicious web page could run unauthorized JavaScript in that user's browser. This could allow for unauthorized access to all relevant data available to that user and actions that affect system integrity. The Cross-Site Scripting (XSS) is possible because Splunk Web does not validate the origin and source of messages received by a page message handler. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The unauthenticated user should not be able to exploit the vulnerability at will.