CVE-2026-93296 Details
Description
MISP contains a stored cross-site scripting (XSS) vulnerability in the Overmind theme's statistics views. The event General card and the server/feed preview card constructed donut chart legend labels by directly concatenating object name or category keys into an innerHTML string without HTML-encoding. Because MISP object names are user-controllable by any authenticated user with sufficient permissions to create or modify such objects, an attacker could craft a name containing malicious markup. When any other user viewed the affected Overmind dashboard, the injected markup would be interpreted as live HTML/JavaScript in the victim's browser, executing in the context of the MISP application origin. This could allow session hijacking, data exfiltration, or arbitrary actions performed on behalf of the victim. The vulnerability requires the attacker to have low-level authenticated access to create or rename an object whose name is rendered in the legend, and the victim to view the Overmind event or server preview page. No special browser conditions or race conditions are required.
A stored cross-site scripting vulnerability has been identified in the Overmind theme of MISP, specifically within the statistics views. This issue arises in the event General card and the server/feed preview card, where donut chart legend labels are created by directly inserting object names or category keys into an innerHTML string without proper HTML encoding. Since MISP object names can be controlled by any authenticated user with the right permissions to create or modify such objects, an attacker could craft a name with malicious markup, such as a script tag or event-handler attribute. When another user views the affected Overmind dashboard, the injected markup would be executed as live HTML/JavaScript in the context of the MISP application origin. This could lead to session hijacking, data exfiltration, or unauthorized actions performed on behalf of the victim. Exploitation requires low-level authenticated access to create or rename an object whose name will be rendered in the legend, and the victim must view the Overmind event or server preview page. No special browser conditions or race conditions are needed.
Users can update to MISP version 2.5.47, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 17, 2026CISA-ADP
Assessed Sep 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/MISP/misp/commit/382188d2f | CIRCL | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CIRCL |
Affected Products
| Product | Versions |
|---|---|
| MISP | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 22, 2026 | CVE Modified | CIRCL |
| Sep 17, 2026 | CVE Modified | CISA-ADP |
| Sep 17, 2026 | New CVE Received | CIRCL |