CVE-2026-27605

MEDIUM 6.3

Chartbrew: Stored Cross-Site Scripting (XSS) via File Upload API

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-434 CWE-79
Vendor	chartbrew
Product	chartbrew
Published	Mar 6, 2026
Last Updated	Mar 6, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Affected Versions

chartbrew / chartbrew

< 4.8.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/chartbrew/chartbrew/security/advisories/GHSA-jf6m-hm53-c364 github.com: https://github.com/chartbrew/chartbrew/releases/tag/v4.8.4