CVE-2026-31818CWE-1188CWE-918ssrf

CVE-2026-31818

Critical · published April 3, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
36.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00434 · 36.6th percentile
Weaknesses
CWE-1188 · Initialization of a Resource with an Insecure Default; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-04-03T20:16Z
Affected products (1)
ProductVersionsFixed in
budibase/budibase< 3.33.43.33.4
References (4)
https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732 · [email protected]https://github.com/Budibase/budibase/pull/18236 · [email protected]https://github.com/Budibase/budibase/releases/tag/3.33.4 · [email protected]https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45 · [email protected]
EPSS history
Timeline
  • 03 APR 15:41Z
    Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist
    cvelistv5