CVE-2026-27605: Chartbrew: Stored Cross-Site Scripting (XSS) via File Upload API
Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to version 4.8.4, the application allows uploading files (project logos) without validating the file type or content. It trusts the extension provided by the user. These files are saved to the uploads/ directory and served statically. An attacker can upload an HTML file containing malicious JavaScript. Since authentication tokens are likely stored in localStorage (as they are returned in the API body), this XSS can lead to account takeover. This issue has been patched in version 4.8.4.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-27605?
CVE-2026-27605 has a medium severity due to the potential for stored cross-site scripting (XSS) attacks.
How do I fix CVE-2026-27605?
To fix CVE-2026-27605, upgrade to Chartbrew version 4.8.4 or later.
What kind of vulnerability is CVE-2026-27605?
CVE-2026-27605 is a stored cross-site scripting (XSS) vulnerability that affects the File Upload API in Chartbrew.
What versions of Chartbrew are affected by CVE-2026-27605?
CVE-2026-27605 affects Chartbrew versions prior to 4.8.4.
What are the potential impacts of CVE-2026-27605?
The potential impacts of CVE-2026-27605 include unauthorized execution of scripts within a user's browser, potentially compromising user data.