CVE-2026-61743 Chartbrew: DNS Rebinding SSRF Bypass in Outbound Request Validation
Authenticated users can bypass SSRF protections via DNS rebinding to access internal services and cloud metadata in Chartbrew.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61743?
CVE-2026-61743 is a medium-severity server-side request forgery vulnerability in chartbrew, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-350
Which versions are affected by CVE-2026-61743?
How do I fix CVE-2026-61743?
No fix has been published for CVE-2026-61743 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-61743 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61743 exists.
Sources
Also known as GHSA-9537-vm84-j26f.