Is this vulnerability remotely exploitable, and does it require any prior access?

Yes. A remote attacker who can send HTTP(S) requests to the Budibase server can exploit this without any prior authentication or valid user account, because the bug resides in the central authorization middleware.

What level of access can an attacker gain by exploiting this issue?

The attacker can reach server-side API endpoints as though fully authenticated and authorized, potentially invoking admin-level or system APIs depending on how the application is configured and which endpoints are exposed.

What is the safest general fix pattern for developers?

Normalize and separate path and query components before applying routing or security logic, use anchored and explicit path checks instead of broad regexes on raw URLs, and ensure that authentication and authorization middleware cannot be skipped based on loosely defined URL patterns.

Severity:

CRITICAL RISK

(9.1)

Authentication Bypass via Unanchored URL Regex (CWE-74) in Budibase Server Middleware

CVE-2026-31816

Published:

Mar 9, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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May 6, 2026

Vulnerability Type

Category:

Authentication and Authorization Bypass

CWE:

CWE-74

Impact:

Full Authentication and Authorization Bypass Across Server APIs

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and Authorization Bypass

CWE:

CWE-74

Impact:

Full Authentication and Authorization Bypass Across Server APIs

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

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Authentication Bypass via Unanchored URL Regex (CWE-74) in Budibase Server Middleware

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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