CVE-2026-103389
MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Active
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph
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
- Record
CVE-2026-103389- CVSS 4.0
- 6.2 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N - Weakness
- CWE-79, CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2026-89965
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
- Record
EUVD-2026-89965- CVSS 4.0
- 6.2 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-58w8-2929-fqhf
MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path....
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
- Record
GHSA-58w8-2929-fqhf- CVSS 4.0
- 6.2 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
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
- Record
CVE-2026-103389- CVSS 4.0
- 6.2 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-20, CWE-79
- Updated
- 2026-11-02
OSV
MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph
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
- Record
CVE-2026-103389- CVSS 4.0
- 6.2 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N - Weakness
- CWE-20, CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-103389 is a medium vulnerability (CVSS 6.2) in Misp, published September 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. No source names a fixed version.