CVE-2026-31818
CRITICAL WAF: Medium
CVSS 9.9
Published: 2026-04-03
CWE-918
Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase's REST datasource connector. The platform's SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.
WAF Coverage Analysis
Server-Side Request Forgery (SSRF)
Medium WAF Coverage
OWASP: A10:2021 SSRF
934xxx - Node.js / Generic Injection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| budibase | budibase | up to 3.33.4 |
References
- github.com (Patch)
- github.com (Issue Tracking, Patch)
- github.com (Product, Release Notes)
- github.com (Exploit, Mitigation, Vendor Advisory)