Description
Chartbrew is an open-source web application for creating charts from databases and APIs. In versions 4.8.5 through 5.2.2, API connection creation and update operations accept the internal  allowPrivateHost  field from user input. An authenticated user with permission to manage API connections can enable this field to bypass private and reserved-network destination restrictions. An upgrade migration also enables the override on pre-existing API connections. The per-connection setting takes precedence over  CB_ALLOW_PRIVATE_NETWORK_CALLS , so disabling that instance option does not protect connections with the override enabled. Successful exploitation allows requests to internal HTTP services reachable from the Chartbrew server, potentially disclosing information or triggering unauthorized actions depending on the target service. Recognized cloud metadata endpoints remain separately blocked. This issue is fixed in version 5.2.3.
Published: 2026-11-06
Score: 9.1 Critical
EPSS: n/a
KEV: No
Impact: Remote Server Side Request Forgery to internal network services
Action: Immediate Patch
AI Analysis

Impact

Chartbrew is an open‑source platform that lets users create charts from APIs and databases. In the vulnerable releases, the API connection interfaces accept a user‑supplied ‘allowPrivateHost’ flag. When enabled, the flag overrides the application’s restrictions on private and reserved network destinations, allowing the server to send HTTP requests to any internal host address that the user can reach. This creates a server‑side request forgery (SSRF) vulnerability that can leak data or trigger actions on internal services. The flaw exists in authenticated API‑connection create and update operations and is not mitigated by the CB_ALLOW_PRIVATE_NETWORK_CALLS setting.

Affected Systems

Affected versions of the chartbrew application are 4.8.5 through 5.2.2. The issue is present in the chartbrew:chartbrew product on all platforms that run the web service, regardless of hosting or deployment model. The vulnerability is fixed in release 5.2.3 and later.

Risk and Exploitability

The CVSS base score is 9.1, indicating a high‑severity flaw. The EPSS score is not available, so the current likelihood of exploitation cannot be quantified, but the lack of an automatic mitigation mechanism and the need for authenticated user interaction increase the risk for organizations that provide API‑connection management rights. The vulnerability is not listed in the CISA KEV catalog, suggesting no public exploitation is confirmed. An attacker would need to create or update an API connection with allowPrivateHost set to true, which is possible only for users with permission to manage API connections.

Generated by OpenCVE AI on November 6, 2026 at 22:24 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Chartbrew to version 5.2.3 or later, where the allowPrivateHost override has been removed and the default behaviour blocks internal network requests.
  • Audit all pre‑existing API connections for the allowPrivateHost flag and set them to false, or delete any connections that need not exist.
  • Restrict the permission to manage API connections to only trusted administrators; remove this capability from users who only need to consume data.

Generated by OpenCVE AI on November 6, 2026 at 22:24 UTC.

Tracking

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Advisories

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History

Fri, 06 Nov 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Chartbrew
Chartbrew chartbrew
Vendors & Products Chartbrew
Chartbrew chartbrew

Fri, 06 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Description Chartbrew is an open-source web application for creating charts from databases and APIs. In versions 4.8.5 through 5.2.2, API connection creation and update operations accept the internal  allowPrivateHost  field from user input. An authenticated user with permission to manage API connections can enable this field to bypass private and reserved-network destination restrictions. An upgrade migration also enables the override on pre-existing API connections. The per-connection setting takes precedence over  CB_ALLOW_PRIVATE_NETWORK_CALLS , so disabling that instance option does not protect connections with the override enabled. Successful exploitation allows requests to internal HTTP services reachable from the Chartbrew server, potentially disclosing information or triggering unauthorized actions depending on the target service. Recognized cloud metadata endpoints remain separately blocked. This issue is fixed in version 5.2.3.
Title Chartbrew: SSRF to Internal Network via User-Controlled allowPrivateHost Flag on API Connections
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

Subscriptions

Chartbrew Chartbrew
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-06T21:15:35.795Z

Reserved: 2026-07-31T21:49:24.927Z

Link: CVE-2026-68935

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-06T22:17:59.390

Modified: 2026-11-06T22:17:59.523

Link: CVE-2026-68935

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T22:45:11Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)