What’s Vulnerable › Vulnerabilities

CVE-2026-61743: Chartbrew: DNS Rebinding SSRF Bypass in Outbound Request Validation

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-21 · updated 2026-09-24
• Weakness: CWE-350

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

• chartbrew: before 5.2.2

References

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

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