Vulnerability Description
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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8
- https://github.com/Budibase/budibase/security/advisories/GHSA-wxq7-x3qp-vcr8
FAQ
What is CVE-2026-48147?
CVE-2026-48147 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 unanch...
How severe is CVE-2026-48147?
CVE-2026-48147 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48147?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.