CVE-2026-61743

Chartbrew: DNS Rebinding SSRF Bypass in Outbound Request Validation

Published 21 Sep 2026 • Updated 21 Sep 2026

Severity: MEDIUM

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 5.2.2, Chartbrew's server/modules/safeRequest.js calls validateOutboundUrl() to resolve and validate a target hostname, but request-promise performs a separate DNS resolution for the actual connection. An authenticated user who can create or test API connections and controls the target DNS name can return a public address during validation and a private address during the request, bypassing the protections implemented by server/modules/outboundTargetPolicy.js. This DNS rebinding condition can expose internal services, localhost resources, or cloud metadata endpoints. This issue is fixed in version 5.2.2.

Affected products (1)

• chartbrew chartbrew

Problem types

• CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action

References (3)

• https://github.com/chartbrew/chartbrew/security/advisories/GHSA-9537-vm84-j26f
• https://github.com/chartbrew/chartbrew/commit/d38d745fe9e45563be8c33e4c7a17788ee6f13a3
• https://github.com/chartbrew/chartbrew/releases/tag/v5.2.2