CVE-2026-54395

MISP contains a reflected cross-site scripting vulnerability in the UiBeta event index view. The urlparams value is inserted into an inline JavaScript handler using HTML escaping inside a single-quoted JavaScript string. Because browsers HTML-decode attribute values before JavaScript parsing, a crafted searcheventinfo value can restore encoded quote characters and break out of the JavaScript string. An attacker could craft a malicious URL that, when opened by a victim using the UiBeta event index, executes arbitrary JavaScript in the victim’s browser in the context of the MISP instance. The issue is fixed by encoding the value as a JavaScript string literal with json_encode() before applying HTML escaping at the attribute layer.

CVSS

No CVSS.

References

Link	Resource
https://github.com/MISP/MISP/commit/b865deb036ca82dab272be260798f562034ba9ae

Configurations

No configuration.

History

12 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-12 21:16

Updated : 2026-06-12 21:16

NVD link : CVE-2026-54395

Mitre link : CVE-2026-54395

CVE.ORG link : CVE-2026-54395

JSON object : View

Products Affected

No product.

CWE

CWE-79

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

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