---
id: CVE-2026-73410
title: Budibase is an open-source low-code platform
summary: >-
  Budibase is an open-source low-code platform. Prior to 3.40.0,
  packages/backend-core/src/utils/outboundFetch.ts pinned a validated address
  through a Node agent, but the REST integration used getDispatcher from
  packages/backend-core/src/u…
severity: high
cvss: 8.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-367
  - CWE-918
published: '2026-08-17'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:03:08.410'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73410'
references:
  - url: >-
      https://github.com/Budibase/budibase/commit/5758bdb242802ca20c4ed0dc579e4330ee898ef3
    label: security-advisories@github.com
  - url: >-
      https://github.com/Budibase/budibase/security/advisories/GHSA-v42f-v8xc-j435
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.0028
epssPercentile: 0.18264
ingestedAt: '2026-09-08T21:11:12.279Z'
---

## Overview

Budibase is an open-source low-code platform. Prior to 3.40.0, packages/backend-core/src/utils/outboundFetch.ts pinned a validated address through a Node agent, but the REST integration used getDispatcher from packages/backend-core/src/utils/fetch.ts, causing undici to ignore that agent and resolve the hostname again. A builder could use DNS rebinding to make packages/server/src/integrations/rest.ts connect to an internal address after a public address passed validation, with full response access and arbitrary REST methods. The fix adds createPinnedLookup support to the undici dispatcher and passes the validated address to custom fetch implementations. This issue is fixed in version 3.40.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.