CVE-2026-41428
CVE-2026-41428 · Budibase: Authentication Bypass via Unanchored Regex in Public Endpoint Matcher — Unauthenticated Access to Protected Endpoints
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.1 · Critical · EPSS 0.4%
- Published
- Updated
Stack: node
Affected products and versions
budibase
- Versions
- < 3.35.4: Affected
No fix published
@budibase/backend-core npm
- Affected ranges
- SEMVER: ≤ 3.35.3
No fix published