OAuth2 Vulnerability in Budibase Low-Code Platform
CVE-2026-48146

7.7HIGH

Key Information:

Vendor

Budibase

Status
Budibase
Vendor
CVE Published:
27 May 2026

What is CVE-2026-48146?

Budibase, a prominent open-source low-code platform, had a vulnerability in its OAuth2 token fetch function prior to version 3.39.0. This flaw arises from the usage of raw fetch without adequate server-side request forgery (SSRF) protection. Although a safe wrapper, fetchWithBlacklist(), is utilized in other HTTP calls within the codebase, it was not implemented for the OAuth2 token endpoint. Consequently, a user with a BUILDER role could potentially exploit this vulnerability to redirect the OAuth2 token URL to internal services, like CouchDB or cloud metadata endpoints, leading to unauthorized data access and exfiltration. This vulnerability has been 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:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.