CVE-2026-103389

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

CVSS

No CVSS.

References

Link	Resource
https://github.com/MISP/MISP/commit/8ea5783dd

Configurations

No configuration.

History

30 Sep 2026, 15:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 15:22

Updated : 2026-09-30 16:17

NVD link : CVE-2026-103389

Mitre link : CVE-2026-103389

CVE.ORG link : CVE-2026-103389

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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