CVE-2026-94373 Details
Description
MISP contains a DOM-based cross-site scripting (XSS) vulnerability in the contextual menu JavaScript component. The ContextualMenu class populates HTML <option> elements by assigning user-controllable values to the innerHTML property. Because innerHTML parses and renders HTML markup, any untrusted string supplied as the option text (value.text or value) is interpreted as live DOM content rather than plain text. An attacker who can influence the data rendered in the contextual menu can inject arbitrary HTML or JavaScript that executes in the victim's browser within the MISP application origin. This may allow session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user. Version affected: <2.5.47
A DOM-based cross-site scripting vulnerability has been identified in MISP versions prior to 2.5.47. The issue arises in the contextual menu JavaScript component, where the ContextualMenu class improperly handles user-controlled values by assigning them to the innerHTML property of HTML <option> elements. This flaw allows an attacker to inject arbitrary HTML or JavaScript that executes in the context of the victim's browser within the MISP application. Exploitation of this vulnerability could lead to session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user.
Users can upgrade to MISP version 2.5.47 or later to address this vulnerability.
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 21, 2026CISA-ADP
Assessed Sep 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/MISP/MISP/commit/b062698f2 | 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 | < 2.5.47 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 21, 2026 | CVE Modified | CISA-ADP |
| Sep 21, 2026 | New CVE Received | CIRCL |