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EUVD-2026-280237

fkie_cve-2026-31818

Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase's REST datasource connector. The platform's SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.

GHSA-7r9j-r86q-7g45 — Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist

Affected: npm: @budibase/backend-core

## 1. Summary

| Field | Value | |-------|-------| | **Title** | SSRF via REST Connector with Empty Default Blacklist Leading to Full Internal Data Exfiltration | | **Product** | Budibase | | **Version** | 3.30.6 (latest stable as of 2026-02-25) | | **Component** | REST Datasource Integration + Backend-Core Blacklist Module | | **Severity** | Critical | | **Attack Vector** | Network | | **Privileges Required** | Low (Builder role, or QUERY WRITE for execution of pre-existing queries) | | **User Interaction** | None | | **Affected Deployments** | All self-hosted instances without explicit `BLACKLIST_IPS` configuration (believed to be the vast majority) |

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## 2. Description

A critical Server-Side Request Forgery (SSRF) vulnerability exists in Budibase's REST datasource connector. The platform's SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the `BLACKLIST_IPS` environment variable is **not set by default** in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns `false`, allowing all requests through without restriction.

This allows any user with `Builder` privileges (or `QUERY WRITE` permission on an existing query) to create REST datasources pointing to arbitrary internal network services, execute queries against them, and fully exfiltrate the responses — including credentials, database contents, and internal service metadata.

The vulnerability is particularly se…

WID-SEC-W-2026-0990 — Budibase: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Budibase ausnutzen, um beliebigen Code auszuführen – sogar mit Root-Rechten –, sich erweiterte Rechte zu verschaffen – sogar Administratorrechte –, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, einen Denial-of-Service-Zustand herbeizuführen oder vertrauliche Informationen offenzulegen.