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CVE-2026-73306— Budibase: Account Enumeration via Login Lockout Response Differential

Quick assessment

Affected
Budibase budibase
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 3.39.25之前版本存在侧信道信息泄露漏洞，该漏洞源于登录接口/api/global/auth/:tenantId/login对已有用户和锁定标识的处理不当，可能导致未经身份验证的攻击者通过比较重复失败后的响应来枚举有效电子邮件地址并临时锁定有效账户。

CVSS 5.3 · Medium EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.39.25 affected
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I. Basic Information for CVE-2026-73306

Vulnerability Information
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Vulnerability Title
Budibase: Account Enumeration via Login Lockout Response Differential
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.25, POST /api/global/auth/:tenantId/login incremented the failure counter in packages/worker/src/api/controllers/global/auth.ts only for existing users, while packages/worker/src/middleware/emailLockout.ts returned X-Account-Locked and Retry-After only for locked identifiers. An unauthenticated attacker could compare the response after repeated failures to enumerate valid email addresses and temporarily lock valid accounts. This issue is fixed in version 3.39.25.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
响应差异性信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 侧信道信息泄露漏洞
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 3.39.25之前版本存在侧信道信息泄露漏洞，该漏洞源于登录接口/api/global/auth/:tenantId/login对已有用户和锁定标识的处理不当，可能导致未经身份验证的攻击者通过比较重复失败后的响应来枚举有效电子邮件地址并临时锁定有效账户。
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 < 3.39.25 -

II. Public POCs for CVE-2026-73306

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III. Intelligence Information for CVE-2026-73306

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Patches & Fixes for CVE-2026-73306 (2)

Vendor Advisories for CVE-2026-73306 (1)

Vendor Pages for CVE-2026-73306 (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-2026-73303 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-2026-73409 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-204

V. Comments for CVE-2026-73306

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