CVE-2026-72855

Received Received - Intake

Budibase SSRF via DNS Rebinding in OpenAPI Import

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: VulnCheck

Description

Budibase before 3.40.0 contains server-side request forgery vulnerabilities in OpenAPI query import and REST query execution that allow authenticated builder-level users to bypass DNS pinning protections through DNS rebinding attacks. Attackers can configure hostnames that resolve to public addresses during validation but resolve to loopback or private addresses during actual connection, allowing access to blocked internal HTTP services.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-13

Last Modified

2026-08-13

Generated

2026-08-14

AI Q&A

2026-08-14

EPSS Evaluated

N/A

NVD

CVE-2026-72855

EUVD

EUVD-2026-58504

Affected Vendors & Products

Vendor	Product	Version / Range
budibase	budibase	to 3.40.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

Budibase before version 3.40.0 has server-side request forgery (SSRF) vulnerabilities in OpenAPI query import and REST query execution features. Authenticated builder-level users can exploit DNS rebinding to bypass DNS pinning protections. This allows attackers to set hostnames that resolve to public addresses during validation but to loopback or private addresses during actual connections, enabling access to restricted internal HTTP services.

Detection Guidance

Detecting this vulnerability requires checking for unauthorized access to internal services via DNS rebinding. Monitor network logs for unusual DNS resolutions or connections to loopback/private addresses from authenticated builder users. Inspect Budibase configurations for OpenAPI or REST queries pointing to internal hosts.

Impact Analysis

An attacker with builder-level access could exploit this to access internal services that should be blocked, potentially leading to unauthorized data access, service disruption, or further network compromise. This could expose sensitive information or allow lateral movement within the network.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Upgrade Budibase to version 3.40.0 or later to address the SSRF vulnerabilities. Implement strict DNS pinning and validate hostnames against a blocklist of private/internal addresses during both validation and connection phases. Restrict builder-level user permissions to minimize attack surface.

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