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CVE-2026-73407— Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak (bypass of CVE-2026-48152))

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公司开源的一款低代码应用构建平台。 Budibase 3.40.1之前版本存在路径遍历漏洞，该漏洞源于RestIntegration._req在附加凭据时未验证最终请求目的地与数据源来源是否匹配，可能导致未经身份验证的攻击者通过向攻击者控制的主机提供绝对或参数化路径，获取存储的Bearer、Basic或Static-Header凭据。

CVSS 9.0 · Critical EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.40.1 affected
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I. Basic Information for CVE-2026-73407

Vulnerability Information
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Vulnerability Title
Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak (bypass of CVE-2026-48152))
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.40.1, RestIntegration._req in packages/server/src/integrations/rest.ts attached credentials from getAuthHeaders and defaultHeaders without requiring the final request destination to match the datasource origin. An unauthenticated caller of a PUBLIC POST /api/v2/queries/:queryId query could supply an absolute or parameterized path to an attacker-controlled host and receive the stored bearer, basic, or static-header credentials. This issue is fixed in version 3.40.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Budibase是英国Budibase公司开源的一款低代码应用构建平台。 Budibase 3.40.1之前版本存在路径遍历漏洞，该漏洞源于RestIntegration._req在附加凭据时未验证最终请求目的地与数据源来源是否匹配，可能导致未经身份验证的攻击者通过向攻击者控制的主机提供绝对或参数化路径，获取存储的Bearer、Basic或Static-Header凭据。
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 < 3.40.1 -

II. Public POCs for CVE-2026-73407

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7664 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-73407

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Patches & Fixes for CVE-2026-73407 (2)

Vendor Advisories for CVE-2026-73407 (1)

Vendor Pages for CVE-2026-73407 (1)

Same Patch Batch · Budibase · 2026-08-12 · 9 CVEs total

CVE-2026-73300 9.6 CRITICAL Budibase: SQL Injection via `multipleStatements: true`
CVE-2026-73303 8.2 HIGH Budibase: Email Change IDOR via POST /api/v2/email allows full Account Takeover (accountId
CVE-2026-73406 7.5 HIGH Budibase: Unauthenticated user information disclosure via public tenant user lookup endpoi
CVE-2026-73308 5.7 MEDIUM Budibase: OAuth2 Token Disclosure via Automation Test Results Broadcast to Other Builders
CVE-2026-73306 5.3 MEDIUM Budibase: Account Enumeration via Login Lockout Response Differential
CVE-2026-73409 5.1 MEDIUM Budibase: Server Filesystem Existence/Read Oracle via Builder-Controlled MongoDB tlsCertif
CVE-2026-73307 4.9 MEDIUM Budibase: SSRF via bare fetch() in uploadUrl during AI table generation
CVE-2026-73301 4.3 MEDIUM Budibase: Missing RBAC on GET /api/global/groups allows BASIC users to enumerate all tenan

IV. Related Vulnerabilities

Same product: budibase
Same vendor: Budibase
Same weakness: CWE-22

V. Comments for CVE-2026-73407

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