Nhost up to 1.45.x nhost configserver improper authorization

Summaryinfo

A vulnerability marked as problematic has been reported in Nhost up to 1.45.x. This impacts an unknown function of the component nhost configserver. This manipulation causes improper authorization. The identification of this vulnerability is CVE-2026-47671. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability was found in Nhost up to 1.45.x. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component nhost configserver. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Nhost is an open source Firebase alternative with GraphQL. In versions of Nhost CLI prior to 1.46.0, the hidden `nhost configserver` used by `nhost dev` exposes the Mimir GraphQL API with dummy authorization directives and permissive CORS. When a developer is running the local development environment, any process that can reach the developer's localhost service, including a web page loaded from an arbitrary origin, can query the configserver for local Nhost configuration and secrets and can mutate the local `.secrets` file. This impacts developers using `nhost dev`: project admin secrets, JWT signing keys, webhook secrets, Grafana credentials, and custom environment variables can be read, and attacker-controlled secrets can be written to the local development project. Version 1.46.0 of Nhost CLI contains a fix.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-47671 since 05/19/2026. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 1.46.0 eliminates this vulnerability.

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Productinfo

Name

• Nhost

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45

Website

• Product: https://github.com/nhost/nhost/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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