CVE-2026-48146CWE-918

Budibase: SSRF via OAuth2 Config Validation — Missing fetchWithBlacklist Protection

High · published May 27, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
26.3
In the wild
Unconfirmed
What it is

Budibase is an open-source low-code platform. Prior to 3.39.0, the OAuth2 token fetch function in packages/server/src/sdk/workspace/oauth2/utils.ts uses raw fetch(config.url) with no SSRF protection. The safe wrapper fetchWithBlacklist() exists in the same codebase and is used in every other outbound HTTP call (automation steps, plugin downloads, object store), but was not applied to the OAuth2 token endpoint. A user with BUILDER role can point the OAuth2 token URL to internal services (CouchDB, cloud metadata) to exfiltrate sensitive data. This vulnerability is fixed in 3.39.0.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00340 · 26.3th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-27T17:00Z
EPSS history
Timeline
  • 27 MAY 17:00Z
    Budibase: SSRF via OAuth2 Config Validation — Missing fetchWithBlacklist Protection
    cvelistv5