CVE-2026-48153Public exploitNetwork attack vector

Authenticated SSRF via unchecked OAuth2 token URL

Published May 27, 2026 · Updated May 27, 2026

SSRF in Budibase before 3.39.0 allows remote authenticated users with builder access to read internal responses via an OAuth2 URL. The OAuth2 SDK fetchToken function sends a POST to a builder-supplied URL with node-fetch without calling blacklist.isBlacklisted, and redirects are followed without revalidation. Builder access is required; the server can reach internal services or cloud metadata and expose response fragments, tenant data, or instance credentials.

CVSS severity8.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Budibase before 3.39.0 allows remote authenticated users with builder access to read internal responses via an OAuth2 URL. The OAuth2 SDK fetchToken function sends a POST to a builder-supplied URL with node-fetch without calling blacklist.isBlacklisted, and redirects are followed without revalidation. Builder access is required; the server can reach internal services or cloud metadata and expose response fragments, tenant data, or instance credentials.

The record

CVE
CVE-2026-48153
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Budibase
Product
Budibase
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.39.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Budibase · Budibaseversion=< 3.39.0

Published CVSS scores

8.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Cloud Instance Metadata API

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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