Insecure Default Initialization of Resource Affecting @budibase/backend-core package, versions <3.33.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BUDIBASEBACKENDCORE-15917492
- published6 Apr 2026
- disclosed3 Apr 2026
- creditMoonster8282
Introduced: 3 Apr 2026
NewCVE-2026-31818 (opens in a new tab)How to fix?
Upgrade @budibase/backend-core to version 3.33.4 or higher.
Overview
@budibase/backend-core is a Budibase backend core libraries used in server and worker
Affected versions of this package are vulnerable to Insecure Default Initialization of Resource via the isBlacklisted function when the BLACKLIST_IPS environment variable is unset, causing the blacklist check to always return false and allowing unrestricted outbound requests from the server to arbitrary internal or external network locations. An attacker with low privileges can access sensitive internal services and exfiltrate confidential data, modify or delete records, and potentially disrupt service operation by creating malicious REST datasources and executing queries targeting internal infrastructure.