CVE-2026-31818 Details
Description
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.
A server-side request forgery (SSRF) vulnerability has been identified in Budibase versions prior to 3.33.4. The issue arises in the REST datasource connector, where the SSRF protection mechanism is ineffective because the BLACKLIST_IPS environment variable is not set by default in official deployment configurations. This oversight allows users with Builder privileges to create datasources that point to internal network services, execute queries, and exfiltrate sensitive data, including credentials and application information.
Users can update to Budibase version 3.33.4 or later, where this vulnerability has been patched. Additionally, it is recommended to configure the BLACKLIST_IPS environment variable to include default private IP ranges and localhost before deploying Budibase.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732 | [email protected] | Patch |
| https://github.com/Budibase/budibase/pull/18236 | [email protected] | Issue TrackingPatch |
| https://github.com/Budibase/budibase/releases/tag/3.33.4 | [email protected] | ProductRelease Notes |
| https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1188 | Initialization of a Resource with an Insecure Default | [email protected] |
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| budibase budibase | < 3.33.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 8, 2026 | Initial Analysis | [email protected] |
| Apr 3, 2026 | New CVE Received | [email protected] |