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CVE-2026-41428— Budibase: Authentication Bypass via Unanchored Regex in Public Endpoint Matcher — Unauthenticated Access to Protected Endpoints

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开源的一个用于在几分钟内创建内部应用程序、工作流和管理面板的低代码平台。 Budibase 3.35.4之前版本存在授权问题漏洞，该漏洞源于经过身份验证的中间件使用非锚定正则表达式匹配ctx.request.url中的公共端点模式，攻击者可通过将公共端点路径作为查询参数附加来绕过所有身份验证。

CVSS 9.1 · Critical EPSS 0.63% · P48
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I. Basic Information for CVE-2026-41428

Vulnerability Information
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Vulnerability Title
Budibase: Authentication Bypass via Unanchored Regex in Public Endpoint Matcher — Unauthenticated Access to Protected Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.35.4, the authenticated middleware uses unanchored regular expressions to match public (no-auth) endpoint patterns against ctx.request.url. Since ctx.request.url in Koa includes the query string, an attacker can access any protected endpoint by appending a public endpoint path as a query parameter. For example, POST /api/global/users/search?x=/api/system/status bypasses all authentication because the regex /api/system/status/ matches in the query string portion of the URL. This vulnerability is fixed in 3.35.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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开源的一个用于在几分钟内创建内部应用程序、工作流和管理面板的低代码平台。 Budibase 3.35.4之前版本存在授权问题漏洞，该漏洞源于经过身份验证的中间件使用非锚定正则表达式匹配ctx.request.url中的公共端点模式，攻击者可通过将公共端点路径作为查询参数附加来绕过所有身份验证。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Budibase budibase < 3.35.4 -

II. Public POCs for CVE-2026-41428

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III. Intelligence Information for CVE-2026-41428

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Vendor Advisories for CVE-2026-41428 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-41428

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