Vulnerability Description
Budibase is a low code platform for creating internal tools, workflows, and admin panels. In 3.31.4 and earlier, the Budibase server's authorized() middleware that protects every server-side API endpoint can be completely bypassed by appending a webhook path pattern to the query string of any request. The isWebhookEndpoint() function uses an unanchored regex that tests against ctx.request.url, which in Koa includes the full URL with query parameters. When the regex matches, the authorized() middleware immediately calls return next(), skipping all authentication, authorization, role checks, and CSRF protection. This means a completely unauthenticated, remote attacker can access any server-side API endpoint by simply appending ?/webhooks/trigger (or any webhook pattern variant) to the URL.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Budibase | Budibase | <= 3.31.4 |
Related Weaknesses (CWE)
References
- https://github.com/Budibase/budibase/security/advisories/GHSA-gw94-hprh-4wj8ExploitVendor Advisory
- https://github.com/Budibase/budibase/security/advisories/GHSA-gw94-hprh-4wj8ExploitVendor Advisory
FAQ
What is CVE-2026-31816?
CVE-2026-31816 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Budibase is a low code platform for creating internal tools, workflows, and admin panels. In 3.31.4 and earlier, the Budibase server's authorized() middleware that protects every server-side API endpo...
How severe is CVE-2026-31816?
CVE-2026-31816 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-31816?
Check the references section above for vendor advisories and patch information. Affected products include: Budibase Budibase.