CVE-2026-27605 Chartbrew: Stored Cross-Site Scripting (XSS) via File Upload API
Attackers can upload malicious HTML files to execute scripts, potentially stealing authentication tokens and taking over user accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-27605?
CVE-2026-27605 is a medium-severity cross-site scripting vulnerability in chartbrew, published on 6 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-27605?
It affects 1 product.
Products include Depomo Chartbrew.
How do I fix CVE-2026-27605?
No fix has been published for CVE-2026-27605 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-27605 being exploited?
There is no known exploitation of CVE-2026-27605 in the wild and no public exploit code.
Other vulnerabilities in chartbrew
- CVE-2026-25888 Chartbrew: Remote Code Execution (RCE) via Vulnerable API
- CVE-2026-27005 Chartbrew: SQL injection in date-type variable handling (applyMysqlOrPostgresVariables)
- CVE-2026-27603 Missing authorization in chartbrew
- CVE-2026-30232 Chartbrew has SSRF in API Data Connection - No IP Validation on User-Provided URLs
- CVE-2026-32252 Chartbrew Cross-Tenant Template Export and Secret Disclosure in `GET /team/:team_id/template/generate/:project_id`
Sources
Also known as GHSA-jf6m-hm53-c364.