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CVE-2026-73302— Budibase: OIDC SSO account takeover: incoming identity linked by email without checking email_verified

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 3.39.30之前版本存在授权问题漏洞，该漏洞源于OIDC流程未验证电子邮件是否已验证，可能导致攻击者通过配置的身份提供商将新身份合并到受害者账户并继承受害者角色。

CVSS 9.0 · Critical EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.39.30 affected
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I. Basic Information for CVE-2026-73302

Vulnerability Information
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Vulnerability Title
Budibase: OIDC SSO account takeover: incoming identity linked by email without checking email_verified
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.30, the OIDC flow in packages/backend-core/src/middleware/passport/sso/oidc.ts resolved an email without getEmailVerified or an email_verified requirement, and packages/backend-core/src/middleware/passport/sso/sso.ts then used users.getGlobalUserByEmail as a fallback account-linking key. An attacker who can authenticate through a configured identity provider that asserts a victim email as unverified can have a fresh provider identity merged into the victim Budibase account and inherit the victim roles. This issue is fixed in version 3.39.30.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 授权问题漏洞
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 3.39.30之前版本存在授权问题漏洞，该漏洞源于OIDC流程未验证电子邮件是否已验证，可能导致攻击者通过配置的身份提供商将新身份合并到受害者账户并继承受害者角色。
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 < 3.39.30 -

II. Public POCs for CVE-2026-73302

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7929 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-2026-73302

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Patches & Fixes for CVE-2026-73302 (2)

Vendor Advisories for CVE-2026-73302 (1)

Vendor Pages for CVE-2026-73302 (1)

Same Patch Batch · Budibase · 2026-08-13 · 13 CVEs total

CVE-2026-72851 10.0 CRITICAL Budibase before 3.40.0 SQL Injection via Unauthenticated Webhook
CVE-2026-72850 9.1 CRITICAL Budibase before 3.40.0 Arbitrary File Write via Path Traversal
CVE-2026-73305 8.8 HIGH Budibase: Privilege escalation via public role assignment API missing app-level authorizat
CVE-2026-72855 8.5 HIGH Budibase before 3.40.0 DNS Rebinding SSRF via OpenAPI and REST
CVE-2026-73618 8.3 HIGH Budibase Server before 3.40.0 NoSQL Injection via JSON Parameter
CVE-2026-72856 8.1 HIGH Budibase before 3.40.0 Authentication Bypass via Tenant Owner Email
CVE-2026-72857 7.7 HIGH Budibase before 3.40.0 Credential Exposure via STRING Fields
CVE-2026-72849 7.7 HIGH Budibase before 3.40.0 Identity Confusion via Chat-Link Handoff CSRF
CVE-2026-72853 7.6 HIGH Budibase before 3.40.0 SQL Injection via Oracle connector
CVE-2026-73408 7.6 HIGH Budibase: MySQL DESCRIBE Backtick Injection via multipleStatements in Database Connector
CVE-2026-73617 7.1 HIGH Budibase before 3.40.0 NoSQL Injection via MongoDB datasource
CVE-2026-73304 4.9 MEDIUM Budibase: SSO OAuth2 Token Leakage via User Metadata Endpoints to Power-Role Users

IV. Related Vulnerabilities

Same product: budibase
Same vendor: Budibase
Same weakness: CWE-287

V. Comments for CVE-2026-73302

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