CVE-2026-117494
Received Received - Intake

XSS in AI Assistant via SVG Image Processing

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)

Description
Cross-Site Scripting (XSS) in the processing of SVG images submitted to the /api/v2/ai/sessions API in the format data:image/svg+xml;base64. Script tags embedded in the SVG are processed when the content is rendered in the assistant window, allowing JavaScript to be executed and the displayed content to be altered.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117494
EUVD
EUVD-2026-110643

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Sisense Cloud BI Platform 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Cross-Site Scripting (XSS) vulnerability in Sisense Cloud BI Platform. It occurs when SVG images are processed via the /api/v2/ai/sessions API using the format data:image/svg+xml;base64. Malicious script tags embedded in the SVG are executed when the content is rendered in the assistant window, allowing JavaScript execution and altering displayed content.

Detection Guidance

To detect this XSS vulnerability in SVG processing via the /api/v2/ai/sessions API, monitor network traffic for base64-encoded SVG images containing script tags. Inspect API responses for data:image/svg+xml;base64 URIs with embedded JavaScript. Use tools like Burp Suite or Wireshark to capture and analyze requests to this endpoint.

Impact Analysis

This vulnerability could allow attackers to execute arbitrary JavaScript in the context of a user's browser session. This may lead to data theft, session hijacking, or unauthorized content manipulation. Users interacting with compromised SVG content could unknowingly expose sensitive information.

Compliance Impact

This XSS vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR's data protection principles and HIPAA's security requirements. It may result in data breaches, non-compliance penalties, and loss of trust due to compromised data integrity and confidentiality.

Mitigation Strategies

Immediately restrict access to the /api/v2/ai/sessions API endpoint to trusted users only. Disable SVG processing or sanitize SVG inputs to remove script tags. Update Sisense Cloud BI Platform to the latest patched version if available. Monitor for unusual activity in the assistant window rendering content.

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