OAuth2 SDK Vulnerability in Budibase Low-Code Platform
CVE-2026-48153

8.5HIGH

Key Information:

Vendor

Budibase

Status
Budibase
Vendor
CVE Published:
27 May 2026

What is CVE-2026-48153?

An improper input validation vulnerability exists in the OAuth2 SDK of Budibase prior to version 3.39.0. The fetchToken function makes a POST request to a user-defined URL without enforcing the necessary security checks, specifically the blacklist.isBlacklisted verification applied in other outbound fetch paths in the codebase. Additionally, the Joi schema for the OAuth2 URL lacks restrictions on the scheme or host, potentially allowing malicious URLs to bypass safeguards. This vulnerability was addressed in version 3.39.0.

Affected Version(s)

budibase < 3.39.0

References

https://github.com/Budibase/budibase/security/advisories/...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.