Description
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.
Published: 2026-08-17
Score: 8.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v42f-v8xc-j435 Budibase: SSRF via DNS rebinding in the REST datasource integration
History

Mon, 17 Aug 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Budibase
Budibase budibase
Vendors & Products Budibase
Budibase budibase

Mon, 17 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Budibase: SSRF via DNS rebinding in the REST datasource integration
Weaknesses CWE-367
CWE-918
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-17T22:01:01.232Z

Reserved: 2026-08-12T14:32:11.795Z

Link: CVE-2026-73410

cve-icon Vulnrichment

Updated: 2026-08-17T21:59:13.109Z

cve-icon NVD

Status : Received

Published: 2026-08-17T21:16:48.823

Modified: 2026-08-17T22:17:26.780

Link: CVE-2026-73410

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T21:45:03Z

Weaknesses
  • CWE-367

    Time-of-check Time-of-use (TOCTOU) Race Condition

  • CWE-918

    Server-Side Request Forgery (SSRF)