What is CVE-2026-41428?

CVE-2026-41428 is a critical-severity vulnerability in Budibase, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-04-24.

How severe is CVE-2026-41428?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Budibase

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…

Vulnerability class: Broken Authentication

EPSS: 0.001 (22.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Budibase — versions < 3.35.4

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

https://github.com/Budibase/budibase/security/advisories/GHSA-8783-3wgf-jggf (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41428?: CVE-2026-41428 is a critical-severity vulnerability in Budibase, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-04-24.
How severe is CVE-2026-41428?: Critical severity. CVSS v3 base score is 9.1 out of 10.