Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-73303— Budibase: Email Change IDOR via POST /api/v2/email allows full Account Takeover (accountId not validated against session)

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 3.40.0之前版本存在授权问题漏洞，该漏洞源于对accountId参数验证不严，未与认证会话绑定，可能导致经过身份验证的攻击者更改受害者邮箱并重置密码。

CVSS 8.2 · High EPSS 0.31% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.40.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-73303

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Budibase: Email Change IDOR via POST /api/v2/email allows full Account Takeover (accountId not validated against session)
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.40.0, POST /api/v2/email on account.budibase.app accepted a client-controlled accountId without binding it to the authenticated session, while checking only currentEmail. An authenticated attacker who obtains a victim account identifier can start the email-change workflow for the victim, receive and submit the verification code through POST /api/v2/email/verification, move the victim email to an attacker-controlled address, and complete a password reset as the victim. 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:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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公司开源的一款低代码应用构建平台。 Budibase 3.40.0之前版本存在授权问题漏洞，该漏洞源于对accountId参数验证不严，未与认证会话绑定，可能导致经过身份验证的攻击者更改受害者邮箱并重置密码。
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-2026-73303

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7628 chars
Pro+ exclusive includes:
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
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-73303

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-73303 (1)

Vendor Pages for CVE-2026-73303 (1)

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

CVE-2026-73300 9.6 CRITICAL Budibase: SQL Injection via `multipleStatements: true`
CVE-2026-73407 9.0 CRITICAL Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak (byp
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-639

V. Comments for CVE-2026-73303

No comments yet

Leave a comment