CVE-2026-48153 HIGH

CVE-2026-48153: Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata

Vendor Budibase
Product budibase
Weakness CWE-918 · SSRF
Published May 27, 2026
Last update May 27, 2026
View on NVD All CVEs

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Budibase is an open-source low-code platform. Prior to 3.39.0, fetchToken in the OAuth2 SDK makes a POST to a builder-supplied URL with plain node-fetch, skipping the blacklist.isBlacklisted check that every other outbound fetch path in the codebase uses. The Joi schema for the OAuth2 URL has no scheme or host restriction. This vulnerability is fixed in 3.39.0.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
May 27, 2026 Record updated