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CVE-2026-73410— Budibase: SSRF via DNS rebinding in the REST datasource integration

Quick assessment

Affected
Budibase budibase
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Budibase是英国Budibase公司开源的一个低代码应用开发平台。 Budibase 3.40.0之前版本存在安全漏洞，该漏洞源于REST集成中的DNS重新绑定问题，可能导致攻击者访问内部地址并执行任意REST方法。

CVSS 8.5 · High EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.40.0 affected
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I. Basic Information for CVE-2026-73410

Vulnerability Information
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Vulnerability Title
Budibase: SSRF via DNS rebinding in the REST datasource integration
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Budibase是英国Budibase公司开源的一个低代码应用开发平台。 Budibase 3.40.0之前版本存在安全漏洞，该漏洞源于REST集成中的DNS重新绑定问题，可能导致攻击者访问内部地址并执行任意REST方法。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Budibase budibase < 3.40.0 -

II. Public POCs for CVE-2026-73410

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 11709 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-73410

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Patches & Fixes for CVE-2026-73410 (1)

Vendor Advisories for CVE-2026-73410 (1)

Same Patch Batch · Budibase · 2026-08-17 · 4 CVEs total

CVE-2026-64657 8.4 HIGH Budibase: Database Connector SQL Injections in PostgreSQL, MS SQL, and MySQL
CVE-2026-35219 7.1 HIGH Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blackl
CVE-2026-54356 7.1 HIGH Budibase authenticated arbitrary S3 signed upload URL issuance via `/api/attachments/:data

IV. Related Vulnerabilities

Same product: budibase
Same vendor: Budibase
Same weakness: CWE-367

V. Comments for CVE-2026-73410

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