CVE•Published 2026-04-03•Modified 2026-04-08•1 article on news•7 live references•NVD data

CVE-2026-31818Budibase · Budibase

Vulnerability data via NVD (ingested)

CVSS v3.1

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-918Server-Side Request Forgery (SSRF)CWE-1188Initialization of a Resource with an Insecure Default

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.

Timeline

Published 2026-04-03

Modified 2026-04-08

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-31818

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Budibase Budibase"

All exposed Budibase Budibase instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Budibase"

HTTP body or banner mentions "Budibase" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-31818