Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-31818

Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist
Back to all
CVE

CVE-2026-31818

Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist

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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/Budibase/budibase/releases/tag/3.33.4, https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31818.json, https://nvd.nist.gov/vuln/detail/CVE-2026-31818, https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732, https://github.com/Budibase/budibase/pull/18236

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00377%
EPSS Percentile
0.31044%
Introduced Version
0
Fix Available
5b0fe83d4ece52696b62589cba89ef50cc009732

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading