CVE-2026-48147

Budibase is an open-source low-code platform. Prior to 3.35.4, the buildMatcherRegex() / matches() functions in packages/backend-core/src/middleware/matchers.ts route patterns are compiled into unanchored regular expressions and tested against ctx.request.url, which includes the full query string. The CSRF middleware in the Budibase Worker uses this matching system to decide whether to skip CSRF token validation. An unauthenticated attacker can forge state-changing cross-origin requests against any Worker API endpoint by injecting a public route pattern into the query string, causing the CSRF middleware to skip token validation entirely. This allows actions such as sending admin invites, modifying global configuration, and managing users without a valid CSRF token. This vulnerability is fixed in 3.35.4.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8
https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8

Configurations

No configuration.

History

27 May 2026, 20:16

Type	Values Removed	Values Added
References	~~() https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8 -~~	() https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8 -

27 May 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-27 18:16

Updated : 2026-06-17 10:54

NVD link : CVE-2026-48147

Mitre link : CVE-2026-48147

CVE.ORG link : CVE-2026-48147

JSON object : View

Products Affected

No product.

CWE

CWE-185

Incorrect Regular Expression

CWE-352

Cross-Site Request Forgery (CSRF)

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