{"cve":"CVE-2026-41428","nvd":{"published":"2026-04-24T20:16:27.523","modified":"2026-06-17T10:46:42.713","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1},"cwes":["CWE-287"],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggf","https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggf"],"products":["budibase:budibase"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-41428","score":0.00445,"percentile":0.38703,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8783-3wgf-jggf","url":"https://osv.dev/vulnerability/GHSA-8783-3wgf-jggf","summary":"Budibase: Authentication Bypass via Unanchored Regex in Public Endpoint Matcher — Unauthenticated Access to Protected Endpoints","modified":"2026-05-05T16:11:35.473841Z","packages":[{"ecosystem":"npm","name":"@budibase/backend-core","purl":"pkg:npm/%40budibase/backend-core","ranges":["<=3.35.3"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}