CVE-2026-27603
Published: 06 March 2026
Summary
CVE-2026-27603 is a high-severity Missing Authentication for Critical Function (CWE-306) vulnerability in Depomo Chartbrew. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requires established identification and authentication to unlock, mitigating missing authentication for continued system access.
Requiring identification and rationale for actions allowed without authentication ensures critical functions are not left unprotected by forcing review of authentication requirements.
Authorizing mobile device connections to organizational systems ensures authentication is performed for this critical access function.
Guarantees critical functions are protected by mandatory invocation of the access control mechanism.
Auditing sessions makes it possible to detect access to critical functions without required authentication.
The assessment process confirms authentication is present and effective for critical functions, preventing exploitation from missing authentication.
Certification assesses that critical functions have required authentication controls in place.
Disabling non-essential functions and services eliminates the need to secure them, reducing exposure from missing authentication on unnecessary components.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Missing authentication on a public-facing web app endpoint (POST /project/:project_id/chart/:chart_id/filter) directly enables remote unauthenticated exploitation to access arbitrary chart data, matching T1190: Exploit Public-Facing Application.
NVD 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 chart filter endpoint POST /project/:project_id/chart/:chart_id/filter is missing both verifyToken and checkPermissions middleware, allowing unauthenticated…
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users to access chart data from any team/project. This issue has been patched in version 4.8.4.
Deeper analysisAI
CVE-2026-27603 is a missing authentication vulnerability in Chartbrew, an open-source web application that connects directly to databases and APIs to create charts from data. In versions prior to 4.8.4, the POST /project/:project_id/chart/:chart_id/filter endpoint lacks both verifyToken and checkPermissions middleware. This flaw allows unauthenticated users to access chart data from any team or project. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) and maps to CWE-306 (Missing Authentication for Critical Function).
Unauthenticated attackers with network access can exploit this issue remotely with low complexity and no user interaction required. By sending a POST request to the vulnerable endpoint with arbitrary project_id and chart_id values, attackers can retrieve chart data from any project, potentially exposing sensitive information visualized in those charts, such as database query results or API-derived insights.
Chartbrew has patched this vulnerability in version 4.8.4. Administrators should upgrade to this version or later to mitigate the issue. Additional details are available in the GitHub security advisory at https://github.com/chartbrew/chartbrew/security/advisories/GHSA-9fhr-5vvc-p455 and the release notes at https://github.com/chartbrew/chartbrew/releases/tag/v4.8.4.
Details
- CWE(s)