CVE-2026-48153

HIGH

Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.5
EPSS 0.0017
EPSS Percentile 7.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (1)
Budibase/budibase < 3.39.0
Published May 27, 2026
Tracked Since May 27, 2026