CVE-2026-41428

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.

• CWE-287

• https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggfExploit, Mitigation, Vendor Advisory
• https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggfExploit, Mitigation, Vendor Advisory

Published

Apr 24, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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