CVE-2026-103389 Details
Description
MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method. A user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session. Impact: - Arbitrary script execution in the context of the victim's MISP session - Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim - Affects both the default and Overmind UI themes Affected versions: <2.5.48
A stored cross-site scripting vulnerability has been identified in MISP versions prior to 2.5.48. The issue arises in the handling of galaxy icons, where the icon field of a galaxy object was saved without proper server-side validation. This unvalidated data was then directly inserted into HTML by the D3-based correlation graph rendering scripts, using the .html() method. As a result, a user with the perm_galaxy_editor permission could inject arbitrary HTML or JavaScript into the icon field. When another user opened the correlation graph of an event containing a cluster from that galaxy, the injected script would execute in their browser session.
Users can update to MISP version 2.5.48 or later, where this vulnerability has been addressed.
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 30, 2026CISA-ADP
Assessed Sep 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/MISP/MISP/commit/8ea5783dd | CIRCL | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | CIRCL |
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CIRCL |
Affected Products
| Product | Versions |
|---|---|
| MISP | < 2.5.48 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 30, 2026 | CVE Modified | CISA-ADP |
| Sep 30, 2026 | New CVE Received | CIRCL |