CVE-2026-31818
CVE-2026-31818 · Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.6 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
budibase
- Versions
- < 3.33.4: Affected
No fix published
@budibase/backend-core npm
- Affected ranges
- SEMVER: < 3.33.4
Update to 3.33.4
Original sources
- https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45
- https://github.com/Budibase/budibase/pull/18236
- https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732
- https://github.com/Budibase/budibase/releases/tag/3.33.4
- https://nvd.nist.gov/vuln/detail/CVE-2026-31818