CVE-2026-66824
CriticalCVSS 9.2Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
A stored XSS vulnerability in the capture tree visualization tool. Serialized tree data was embedded in an inline JavaScript block, allowing injection of malicious HTML/JavaScript. An attacker could perform actions in the victim's session context.
Risk Assessment
The risk includes session theft, access to victim data, and modification of application data within user permissions.
Recommendation
Apply the patch that removes JSON data from the HTML document and retrieves it via a dedicated API endpoint.
Original NVD description (English source)
A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter. Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree. Successful exploitation could allow an attacker to perform actions using the victim’s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user. The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page’s HTML or JavaScript context.