CVE-2026-41428: Budibase

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Budibase Budibase: before 3.35.4 (fixed in 3.35.4)

Published 2026-04-24. Last modified 2026-06-17.