CVE-2026-31818
CriticalCVSS 9.6Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
Budibase prior to version 3.33.4 has a Server-Side Request Forgery (SSRF) vulnerability in the REST datasource connector. The SSRF protection mechanism (IP blacklist) is ineffective because the BLACKLIST_IPS environment variable is not set by default in any official deployment configuration. When empty, the blacklist function unconditionally returns false, allowing all requests through.
Risk Assessment
An attacker can use the Budibase server to make requests to internal network resources, bypassing firewalls and gaining access to sensitive systems.
Recommendation
Upgrade Budibase to version 3.33.4 or later. Set the BLACKLIST_IPS environment variable with an appropriate list of IP addresses to block.
Original NVD description (English source)
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.