# CVE-2026-41428

> Vulnerability · severity: **CRITICAL** (CVSS 9.1).

## 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.

## Key facts

- **CVE ID:** CVE-2026-41428
- **Published:** 2026-04-24
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.1
- **CWE codes:** CWE-287

## Affected products

- `budibase:budibase`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41428

## Citation

> AI Analytics. CVE-2026-41428. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-41428. Derived from NIST NVD. Licensed CC0.

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